| 2 | 1883 Flood |
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| 1 | 1892 Fire |
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| 1 | 1909 Tariff Act |
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| 3 | A. B. Chance Company |
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| 1 | A. L. Dyke |
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| 5 | A. O. Austin |
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| 1 | A.F.G.W.U. |
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| 1 | AC vs DC |
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| 49 | AFGWU |
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| 1 | AT&T |
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| 1 | Accident |
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| 3 | Acme Porcelain Works |
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| 186 | Ad |
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| 14 | Adamant Porcelain Company |
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| 1 | Aeromotor Company |
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| 8 | Aetna Insulator |
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| 1 | Afghanistan |
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| 2 | Agent |
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| 9 | Ajax Line Material Company |
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| 2 | Akron China Company |
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| 31 | Akron Hi-Potential Porcelain Company |
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| 50 | Akron Insulator & Marble Company |
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| 3 | Akron Marble Works |
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| 1 | Akron Marble and Novelty Company |
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| 1 | Akron Pottery Company |
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| 13 | Akron Smoking Pipe Company |
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| 1 | Akron Stone Marble Company |
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| 1 | Akron Toy Company |
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| 4 | Alberhill Coal and Clay Company |
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| 1 | Alberhill Pottery Co. |
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| 28 | Albert & J. M. Anderson Company |
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| 1 | Albert & J. M. Anderson Manufacturing Company |
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| 5 | Albert Vickers |
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| 17 | Alley Agate Company |
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| 45 | Alley Glass Company |
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| 1 | Allgemeine Elektricitaets-Gesellschaft |
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| 1 | American Carbon & Battery Company |
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| 1 | American Carbon Battery Company |
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| 4 | American Electric Porcelain Company |
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| 17 | American Hot Cast Porcelain Company |
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| 11 | American Insulator Company |
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| 11 | American Iron Glass Pipe & Plate Company |
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| 3 | American Lava Company |
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| 1 | American Lava Manufacturing Company |
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| 13 | American Marble & Toy Manufacturing Company |
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| 7 | American Marble Works |
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| 1 | American Porcealain Company |
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| 2 | American Porcelain Company |
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| 5 | American Porcelain Works |
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| 4 | American Potteries Company |
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| 1 | American River |
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| 1 | American Telephone and Telegraph Company |
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| 8 | American Union Telegraph Company |
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| 1 | American Vitrified Conduit Company |
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| 1 | Amos Clifford Shinkle |
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| 63 | Anacortes Glass Company |
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| 5 | Anchor Electric Company |
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| 2 | Anchor Pottery |
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| 34 | Anderson Porcelain Company |
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| 1 | Andrew's Insulator |
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| 1 | Anglo-American Potteries |
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| 3 | Angus Hibbard |
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| 2 | Anna Johnson Hemingray |
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| 11 | Annual Shut-Down |
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| 2 | Anthony Gray |
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| 1 | Apple River |
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| 16 | Arc Light |
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| 3 | Arcing Ring |
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| 2 | Argentina |
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| 3 | Aries Brooke |
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| 3 | Arizona |
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| 75 | Armstrong Cork Company |
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| 1 | Arrowheads |
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| 12 | Arthur Watts |
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| 5 | Artistic Porcelain Company |
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| 2 | Ashworth |
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| 4 | Association of Flint & Lime Glass Manufacturers |
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| 20 | Associations |
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| 1 | Atlantic and Pacific Telegraph Company |
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| 13 | Atlas Glass Company |
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| 4 | Atwood Faience Company |
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| 18 | Aurora, Elgin & Chicago Railway |
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| 7 | Australia |
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| 20 | Australian Glass Manufacturing Company |
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| 1 | Australian Porcelain Company |
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| 2 | Australian Porcelain Company Proprietary, Ltd |
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| 3 | Automatic Machinery Manufacturing & Sales Company |
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| 1 | Babson Brothers Company |
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| 2 | Bain Insulator |
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| 2 | Bakelite |
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| 4 | Baker & Cutting Glassworks |
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| 1 | Bakersfield |
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| 1 | Ball Brothers |
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| 1 | Ball Electric Light Company |
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| 55 | Baltimore Glass Manufacturing Company |
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| 45 | Baltimore and Ohio Telegraph Company |
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| 1 | Bangor |
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| 1 | Bankers & Brokers Telegraph Company |
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| 1 | Barb-Wire Telephone |
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| 32 | Barberton Pottery Company |
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| 1 | Barclay |
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| 2 | Barnes & Kobert Manufacturing Company |
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| 1 | Barton, VT |
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| 8 | Batchelder |
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| 8 | Battery Insulator |
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| 91 | Battery Jar |
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| 143 | Battery Jars |
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| 7 | Baum |
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| 13 | Bay Counties Power Company |
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| 21 | Bay State Glass Works |
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| 3 | Beaver Falls Glass Company |
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| 2 | Bed Insulator |
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| 3 | Belgium |
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| 1 | Bell Insulator |
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| 54 | Bell Pottery Company |
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| 1 | Belleek Potteries |
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| 1 | Benjamin Dinsmore |
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| 7 | Bennett |
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| 15 | Bennington Pottery |
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| 2 | Bentley Plimpton |
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| 4 | Berkshire Glass Sand Company |
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| 1 | Bernard |
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| 36 | Bertram M. Downs |
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| 1 | Bessie Hemingray |
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| 2 | Bibber-White Company |
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| 6 | Big Cottonwood Canyon |
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| 1 | Bird's Nest |
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| 9 | Birmingham Glass Manufacturing Company |
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| 3 | Birth |
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| 1 | Bishop Creek |
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| 1 | Black Glaze |
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| 1 | Block Insulator |
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| 1 | Bloes |
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| 11 | Bloom Jar Company |
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| 2 | Bloomfield |
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| 2 | Blue Lakes |
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| 1 | Boch |
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| 21 | Boch Patent |
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| 1 | Boch-Metsch Porcelain Company |
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| 1 | Bodie |
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| 1 | Bohemia |
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| 1 | Bois D'Arc |
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| 1 | Bolt Insulator |
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| 1 | Borel |
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| 1 | Boro-Silica Insulator |
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| 1 | Boro-silicate Glass |
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| 1 | Boston |
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| 11 | Boston Bottle Works |
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| 6 | Boston Electric Light Company |
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| 1 | Boston and Sandwich Glass Company |
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| 2 | Bottles |
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| 50 | Bracket |
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| 1 | Brackets |
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| 33 | Bradford Shinkle |
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| 5 | Bradley A. Fiske |
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| 3 | Bradley Fiske |
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| 1 | Brazil |
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| 1 | Breckenridge |
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| 2 | Brent Mills |
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| 1 | Brett and Little |
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| 14 | Brian Pottery Company |
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| 1 | Brick Insulators |
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| 3 | Bridle Ring |
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| 8 | Bright's Insulator |
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| 35 | Brilliant Glass Company |
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| 1 | Brimstone Insulator |
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| 14 | British Insulator |
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| 3 | British Insulite Company |
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| 1 | Brock Glass Company |
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| 3 | Brodie |
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| 5 | Brodie Electric Company |
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| 2 | Brodie Tree Insulator |
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| 615 | Brookfield |
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| 3 | Brookfield Catalog |
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| 5 | Brookfield Family |
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| 39 | Brookfield Glass Company |
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| 3 | Brown Boveri |
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| 3 | Brown Duplex Insulator |
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| 1 | Brunt |
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| 1 | Brunt & Thompson |
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| 1 | Brunt Porcelain Company |
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| 1 | Brunt Tile & Porcelain Company |
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| 6 | Brunt Tile and Porcelain Company |
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| 14 | Brunt and Thompson |
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| 2 | Brush Electric Light Company |
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| 2 | Brusio |
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| 1 | Bryant Electric Company |
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| 2 | Buck |
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| 1 | Buffalo |
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| 1 | Buller |
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| 1 | Buller & Co. |
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| 1 | Buller & Jobson |
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| 1 | Bunnell |
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| 1 | Bureau Knob |
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| 1 | Burke |
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| 2 | Bus Bar Insulator |
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| 122 | Bushwick Glass Works |
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| 4 | Business Connection |
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| 14 | Business Trip |
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| 1 | Butler Hard Rubber Company |
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| 1 | Butte |
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| 7 | Buzby |
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| 1 | C. E. Eveleth |
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| 1 | C. S. |
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| 24 | C. S. Knowles |
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| 1 | C. W. |
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| 2 | CD 1000 |
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| 1 | CD 1010 |
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| 1 | CD 1012 |
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| 1 | CD 1014 |
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| 1 | CD 102 |
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| 1 | CD 1037 |
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| 5 | CD 1038 |
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| 6 | CD 106 |
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| 1 | CD 109 |
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| 1 | CD 109.5 |
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| 1 | CD 109.7 |
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| 1 | CD 110 |
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| 5 | CD 110.5 |
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| 5 | CD 110.6 |
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| 1 | CD 113 |
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| 1 | CD 114.2 |
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| 1 | CD 116 |
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| 2 | CD 1182 |
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| 3 | CD 121 |
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| 1 | CD 121.4 |
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| 1 | CD 122 |
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| 1 | CD 122.4 |
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| 6 | CD 123 |
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| 1 | CD 124.5 |
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| 1 | CD 125 |
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| 1 | CD 126 |
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| 1 | CD 126.3 |
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| 1 | CD 128 |
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| 2 | CD 132.4 |
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| 1 | CD 134 |
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| 1 | CD 134.6 |
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| 9 | CD 135 |
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| 2 | CD 139 |
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| 2 | CD 140 |
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| 2 | CD 141.8 |
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| 2 | CD 141.9 |
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| 1 | CD 143.4 |
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| 7 | CD 144 |
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| 2 | CD 145 |
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| 2 | CD 147 |
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| 1 | CD 150 |
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| 1 | CD 151 |
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| 4 | CD 152 |
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| 2 | CD 154 |
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| 9 | CD 158.6 |
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| 1 | CD 160 |
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| 5 | CD 162 |
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| 1 | CD 162.4 |
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| 2 | CD 164 |
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| 1 | CD 168 |
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| 1 | CD 176.9 |
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| 2 | CD 178 |
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| 1 | CD 178.2 |
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| 1 | CD 178.5 |
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| 1 | CD 180 |
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| 2 | CD 180.5 |
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| 16 | CD 181 |
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| 1 | CD 185 |
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| 1 | CD 187 |
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| 1 | CD 190 191 |
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| 3 | CD 190-191 |
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| 2 | CD 196 |
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| 1 | CD 196.2 |
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| 5 | CD 202 |
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| 1 | CD 203 |
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| 5 | CD 204 |
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| 1 | CD 206.5 |
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| 3 | CD 207.5 |
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| 1 | CD 208 |
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| 3 | CD 211 |
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| 9 | CD 244 |
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| 5 | CD 245 |
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| 4 | CD 249 |
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| 3 | CD 257 |
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| 8 | CD 259 |
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| 2 | CD 263 |
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| 3 | CD 269 |
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| 1 | CD 280 |
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| 4 | CD 282 |
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| 18 | CD 283 |
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| 1 | CD 284 |
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| 2 | CD 286 |
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| 1 | CD 286.9 |
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| 11 | CD 287 |
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| 3 | CD 287.1 |
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| 3 | CD 287.2 |
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| 11 | CD 288 |
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| 6 | CD 293 |
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| 1 | CD 300 |
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| 1 | CD 303 |
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| 13 | CD 303-310 |
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| 5 | CD 304-310 |
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| 3 | CD 308 |
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| 2 | CD 310 |
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| 5 | CD 313 |
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| 5 | CD 313.1 |
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| 2 | CD 317 |
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| 1 | CD 317.5 |
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| 5 | CD 317.8 |
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| 1 | CD 317.9 |
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| 1 | CD 319 |
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| 1 | CD 321 |
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| 1 | CD 331 |
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| 7 | CD 342 |
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| 1 | CD 35 |
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| 1 | CD 36 |
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| 4 | CD 630 |
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| 4 | CD 631 |
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| 1 | CD 732.2 |
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| 3 | CD 734 |
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| 1 | CD ??? |
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| 1 | Cable Insulator Company |
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| 91 | Cadiz Glass Company |
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| 1 | Calgary |
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| 35 | California |
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| 24 | California Electrical Works |
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| 175 | California Glass Insulator Company |
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| 23 | California Glass Works |
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| 4 | Calista Gray |
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| 1 | Callaway County Clay Company |
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| 8 | Cambridge Electric Light Company |
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| 1 | Camilla Shinkle |
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| 19 | Canada |
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| 3 | Canada Glass Company |
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| 1 | Canada Glass Corporation |
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| 1 | Canadian |
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| 1 | Canadian General Electric Company |
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| 4 | Canadian Glass Manufacturing Company |
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| 2 | Canadian Niagara Power Company |
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| 2 | Canadian Ohio Brass Company |
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| 1 | Canadian Pacific Railroad |
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| 5 | Canadian Pacific Railway Company |
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| 1 | Canadian Pacific Railway Telegraph Company |
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| 3 | Canadian Pacific Telegraph |
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| 2 | Canadian Porcelain Company |
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| 3 | Canon City |
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| 1 | Canon Ferry |
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| 8 | Canton Insulator & Clay Company |
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| 3 | Caoutchouc |
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| 1 | Capanema |
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| 1 | Car Stop |
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| 3 | Carey Ohio Porcelain Company |
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| 3 | Carl H. Smith |
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| 1 | Carlotta Campiglio |
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| 5 | Carquinez Straits |
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| 1 | Carrier Circuit |
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| 9 | Carroll Hemingray |
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| 4 | Carroll and Llewellyn Hemingray |
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| 2 | Case Transposition |
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| 8 | Cassius Alley |
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| 1 | Catalog |
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| 2 | Catawba River |
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| 1 | Catenary |
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| 2 | Catherine Hemingray |
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| 2 | Cauvet |
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| 1 | Cement |
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| 1 | Cement-Hood |
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| 1 | Central District & Printing Telegraph Company |
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| 3 | Central Electric Company |
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| 1 | Central Glass Works |
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| 1 | Central Pacific Railroad |
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| 3 | Central Porcelain Works |
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| 1 | Ceramic Electrical Company |
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| 1 | Ceramic Porcelain Company |
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| 6 | Ceramic Products Corporation |
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| 4 | Chambers |
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| 1 | Chambers Lightning Protection Company |
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| 2 | Chambly |
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| 5 | Champion Glass Works |
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| 6 | Champion Porcelain Company |
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| 3 | Champion Spark Plug Company |
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| 2 | Charles Bright |
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| 4 | Charles Howell Cook |
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| 1 | Charles Kimble |
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| 1 | Charles P. Steinmetz |
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| 15 | Charles T. Chester |
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| 6 | Charles Tigner |
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| 1 | Chauvin |
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| 9 | Chelsea Pottery |
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| 2 | Chesapeake and Potomac Telephone Company |
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| 19 | Cheshire Glass Manufacturing Company |
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| 1 | Chesney |
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| 1 | Chicago |
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| 43 | Chicago Insulating Company |
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| 3 | Chicago, Lake Shore and South Bend Railway |
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| 58 | Child Labor |
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| 2 | China |
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| 4 | China Products Company |
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| 1 | Christmas |
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| 3 | Chubbuck |
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| 1 | Cincinnati Porcelain Company |
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| 3 | Circle F Manufacturing Company |
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| 4 | Citizen's Electric Light Company |
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| 9 | Civil War |
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| 1 | Clamp |
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| 1 | Clara Keck |
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| 1 | Clark Electric & Manufacturing Company |
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| 1 | Clarke Electric & Specialty Manufacturing Company |
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| 1 | Clarken Company |
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| 9 | Clay Casting Company |
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| 1 | Clay Forming Company |
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| 1 | Clay Products Company |
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| 78 | Cleat |
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| 2 | Cleveland Paper Insulator |
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| 2 | Climax Porcelain Company |
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| 1 | Climax Pottery Company |
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| 1 | Clincho |
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| 2 | Cloche-Mehun Insulator |
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| 20 | Coal |
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| 1 | Cohansey Glass Company |
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| 8 | Colorado |
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| 1 | Columbian Exposition |
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| 8 | Community Relations |
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| 1 | Compagnie Generale d'Electricite' |
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| 1 | Compagnie Generale d'Electro-Ceramique |
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| 1 | Compressed Air |
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| 1 | Compromise Pattern |
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| 2 | Connecticut |
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| 5 | Conover Insulator Company |
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| 16 | Consumers Insulator Company |
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| 6 | Converse |
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| 6 | Cook Porcelain Insulator Corporation |
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| 25 | Cook Pottery Company |
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| 1 | Cooke |
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| 4 | Coors Porcelain Company |
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| 2 | Cordeaux |
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| 273 | Corning Glass Works |
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| 11 | Covington |
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| 13 | Creaghead Engineering Company |
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| 17 | Cryolite |
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| 34 | Crystal Glass Company |
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| 3 | Crystal Porcelain Company |
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| 33 | Crystalite Products Corporation |
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| 13 | Cutter |
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| 141 | D. C. Jenkins Glass Company |
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| 48 | D. M. Steward Manufacturing Company |
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| 6 | Daniel Ashworth |
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| 21 | Daniel Carroll Hemingray |
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| 141 | David Brooks |
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| 2 | David Crossley |
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| 4 | Davidson & Stevenson Porcelain Company |
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| 12 | Davidson Porcelain Company |
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| 1 | De Cew Falls |
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| 4 | Dead-end Spool |
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| 1 | Deadend Spool |
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| 101 | Death |
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| 1 | Denmark |
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| 32 | Denver |
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| 47 | Detroit Electrical Works |
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| 64 | Diamond Flint Glass Company |
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| 78 | Diamond Glass Company |
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| 4 | Diamond Porcelain Company |
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| 244 | Dominion Glass Company |
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| 1 | Dry Process |
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| 1 | Duluth |
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| 8 | Duncan |
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| 13 | Dunton & Field |
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| 20 | Duquesne Glass Company |
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| 46 | Dyke |
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| 3 | E. G. Bernard Company |
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| 1 | E. H. Merrill Company |
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| 18 | E. S. Greeley & Company |
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| 1 | Eagle Porcelain Company |
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| 12 | Eagle Pottery Company |
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| 2 | Earthenware Insulator |
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| 1 | East End China Company |
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| 3 | East End Pottery Company |
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| 1 | Economic Conditions |
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| 1 | Egg |
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| 6 | Electric Appliance Company |
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| 32 | Electric Porcelain & Manufacturing Company |
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| 28 | Electric Porcelain Company |
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| 23 | Electrical Glass Corporation |
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| 8 | Electrical Insulator Manufacturing Company |
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| 2 | Electrical Porcelain |
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| 33 | Electrical Porcelain Company |
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| 41 | Electrical Supply Company Chicago |
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| 1 | Electron |
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| 1 | Electrose |
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| 33 | Electrose Manufacturing Company |
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| 1 | Elektro Porcelain Company |
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| 4 | Elgin and Belvidere Electric Railway |
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| 1 | Elkins Tree Insulator Company |
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| 29 | Ellenville Glass Works |
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| 11 | Elliott |
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| 39 | Elmer Glass Company |
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| 2 | Emminger |
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| 14 | Empire China Works |
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| 1 | Employee |
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| 238 | Employees |
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| 1 | Empreza Electra-Ceramica |
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| 1 | Enggren |
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| 5 | England |
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| 1 | Ernest E. Bilby |
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| 2 | Etheridge |
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| 1 | Etho Insulator |
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| 4 | Etruria Pottery |
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| 3 | Eureka Cleat |
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| 4 | Europe |
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| 1 | European Insulator |
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| 19 | Evans |
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| 2 | Everready Porcelain Company |
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| 1 | Excelsior Glass Company |
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| 1 | Excelsior Pottery Works |
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| 5 | Ezra Cornell |
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| 3 | F. J. Barnard |
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| 1 | FIX DOLLAR |
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| 1 | Factory Equipment |
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| 4 | Factory Rebuild |
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| 1 | Fairmount |
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| 1 | Fairmount Glass Works |
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| 21 | Family |
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| 2 | Faradoid |
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| 3 | Farmer |
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| 4 | Fay Clamp |
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| 10 | Federal Porcelain Company |
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| 2 | Feeder Insulator |
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| 54 | Felix |
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| 5 | Female Labor |
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| 1 | Fernando C. Mesa Company |
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| 15 | Fiberite Company |
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| 21 | Findlay Electric Porcelain Company |
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| 4 | Findlay Glass and Carbon Company |
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| 90 | Fire |
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| 1 | Fire Grenade |
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| 1 | Firebrick Insulator Company |
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| 2 | Fireplug |
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| 3 | First Insulator |
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| 6 | Fisher Electric Company |
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| 2 | Fishing |
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| 3 | Fisk Street Station |
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| 5 | Fiske-Mott |
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| 1 | Fletcher Insulator |
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| 5 | Fletcher Manufacturing Company |
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| 28 | Flood |
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| 5 | Floor Insulator |
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| 2 | Floor Tubes |
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| 3 | Fog |
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| 1 | Fog Box |
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| 1 | Fog Type |
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| 2 | Fog-Type |
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| 1 | Fogbowl |
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| 9 | Folsom |
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| 3 | Folsom-Sacramento |
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| 1 | Ford City Pottery |
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| 75 | Foree Bain |
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| 161 | Foreign |
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| 1 | Foreign Glass |
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| 13 | Foreign Insulator |
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| 6 | Foreign Porcelain |
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| 1 | Fowler Insulator Syndicate |
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| 1 | Fox |
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| 4 | France |
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| 1 | Frank Baum |
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| 30 | Frank Fisher |
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| 2 | Frank H. Riddle |
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| 3 | Frank Riddle |
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| 1 | Franklin Porcelain Company |
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| 311 | Fred Locke |
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| 2 | Fred M. Locke |
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| 2 | Fred M. Locke & Company |
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| 45 | Frederic Duggan |
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| 2 | Frederic Gisborne |
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| 3 | Freeman Electric Company |
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| 5 | Freeman Electric Porcelain Company |
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| 1 | Frenchtown Porcelain Company |
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| 4 | Fresno |
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| 1 | Fritz |
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| 4 | Fruit Jar |
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| 57 | Fuel |
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| 2 | Fuller & Son |
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| 4 | Fuseholder |
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| 35 | G. F. Brunt Porcelain Company |
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| 1 | G. W. Thomas |
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| 1 | GGBBA |
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| 1 | Garrity |
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| 211 | Gayner Glass Works |
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| 257 | General |
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| 60 | General Electric Company |
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| 28 | General Porcelain Company |
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| 9 | George Brunt |
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| 1 | George Fry |
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| 1 | German |
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| 6 | Germany |
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| 3 | Gerry |
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| 2 | Gilbert |
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| 2 | Gilbert's Shackle Ball |
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| 2 | Gilchrist Jar Company |
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| 1 | Gill Brothers |
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| 3 | Gill Clay Pot Company |
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| 2 | Gingerbread Man |
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| 1 | Ginori |
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| 1 | Gisborne |
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| 1 | Gladding Ceramic Insulator Company |
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| 28 | Glass |
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| 20 | Glass Ballot Box |
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| 4 | Glass Block |
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| 2 | Glass Blocks |
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| 31 | Glass Conduits |
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| 2 | Glass Industry |
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| 38 | Glass Insulator |
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| 1 | Glass Knob |
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| 3 | Glass Milk Pans |
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| 2 | Glass Patent |
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| 1 | Glass Presses |
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| 1 | Glass Rosettes |
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| 1 | Glass additives |
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| 3 | Glass vs Porcelain |
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| 1 | Glass-Unknown |
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| 2 | Glaze |
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| 2 | Glaze color |
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| 8 | Glaze-Filled Insulator |
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| 1 | Glaze-filled |
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| 2 | Glazeweld |
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| 1 | Glazewelds |
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| 5 | Gleason-Tiebout Glass Company |
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| 15 | Globe Pottery Company |
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| 3 | Goddard |
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| 1 | Good Manufacturing Company |
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| 2 | Goodyear |
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| 5 | Goodyear Vulcanite Company |
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| 1 | Gordon Battery Company |
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| 18 | Gould & Watson Company |
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| 6 | Gould, Inc. |
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| 3 | Grand Rapids |
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| 2 | Grand Rapids, Holland and Lake Michigan Rapid Railway |
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| 1 | Granite Marbles |
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| 35 | Gray |
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| 2 | Great Barrington |
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| 1 | Great North Western Telegraph Company |
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| 1 | Great Northwestern Company |
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| 4 | Greenwood China Company |
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| 11 | Greenwood Pottery Company |
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| 1 | Gromo, Italy |
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| 7 | Guanajuato |
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| 1 | Guard Wire Insulator |
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| 1 | Guido Semenza |
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| 1 | Gun |
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| 1 | Gustafsberg Pottery |
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| 2 | H. B. Camp Pottery |
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| 269 | H. C. Fry Glass Company |
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| 3 | H. D. Murdock |
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| 1 | H. E. Hoenig |
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| 2 | H. E. Swift Manufacturing Company |
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| 3 | H. H. Cochrane |
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| 1 | H. L. China Company |
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| 7 | H. L. Dixon |
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| 1 | H. Schomburg and Sons Company |
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| 98 | H. T. Paiste |
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| 65 | H. W. Johns Manufacturing Company |
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| 57 | H. W. Johns-Manville Company |
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| 17 | Haley Insulator |
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| 4 | Hall China Company |
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| 1 | Hamilton |
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| 5 | Hamilton Glass Company |
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| 24 | Hammond Cleat & Insulator Company |
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| 2 | Hanson |
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| 84 | Hardware |
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| 66 | Harloe Insulator Company |
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| 1 | Harold Buck |
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| 1 | Harrison G. Dyar |
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| 1 | Harrison G. Dyer |
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| 1 | Hartford Electric Light Company |
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| 22 | Hartford Faience Company |
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| 2 | Hawken |
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| 5897 | Hemingray |
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| 922 | Hemingray Family |
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| 707 | Hemingray Glass Company |
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| 1 | Hemingray, Joseph C. |
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| 1 | Hemingray, Ralph |
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| 5 | Hemingray, Ralph Gray |
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| 2 | Hemming Manufacturing Company |
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| 7 | Henry Brunt |
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| 3 | Henry Brunt and Son |
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| 15 | Henry Floy |
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| 1 | Hermsdorf Porzellanfabrik |
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| 2 | Hetherington Insulator |
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| 1 | Hewett |
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| 18 | Hewlett |
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| 3 | Home Telephone Company |
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| 50 | Homer Brooke |
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| 2 | Honesdale Glass Manufacturing Company |
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| 1 | Honesdale, PA |
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| 3 | Hook |
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| 1 | Hopewell Insulating and Manufacturing Company |
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| 8 | House Insulator |
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| 12 | Houston Glass Company |
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| 14 | Houston Glass Works |
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| 1 | Hudson Bay Company |
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| 7 | Hudson Porcelain Company |
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| 5 | Hudson River |
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| 2 | I-T-E Circuit Breaker Company |
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| 1 | Idaho |
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| 15 | Illinois Electric Porcelain Company |
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| 175 | Imperial Porcelain Works |
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| 2 | India |
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| 1 | Indiana Gas Belt |
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| 2 | Industrial Ceramics, Incorporated |
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| 1 | Inkstand |
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| 41 | Insulator |
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| 16 | Insulator Design |
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| 25 | Insulator Testing |
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| 20 | Pilkington Brothers, Ltd. |
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| 68 | Pin |
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| 8 | Pittsburg High Voltage Insulator Company |
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| 7 | Pittsburg Voltage Insulator Company |
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| 2 | Pittsburgh |
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| 3 | Placerville & Humboldt Telegraph Company |
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| 16 | Pluto |
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| 36 | Porcelain Insulator |
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| 8 | Porcelain vs Glass |
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| 1 | Porzellanfabrik |
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| 35 | Pyrex |
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| 202 | R. Thomas & Sons Company |
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| 19 | Radio Antenna Insulator |
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| 27 | Ralph Gray |
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| 26 | Ralph Mershon |
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| 1 | Raquette River |
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| 6 | Ravenswood Porcelain Company |
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| 14 | Reconstructed Granite Company |
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| 10 | Richard Ginori |
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| 4 | Robert "Robin" Hemingray |
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| 11 | Robert Carroll Hemingray |
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| 17 | Robert Good |
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| 15 | Robert Hemingray |
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| 3 | Robinson-Merrill Pottery Company |
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| 1 | Rochester, Syracuse & Eastern Railroad |
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| 83 | Rodefer |
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| 5 | Samuel F. B. Morse |
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| 96 | Samuel Oakman |
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| 1 | San Francisco & Pacific Glass Works |
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| 18 | San Francisco and Pacific Glass Works |
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| 12 | Screw-top |
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| 15 | Shay, Stephens & Company |
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| 11 | Siemens |
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| 27 | Slater Lewis |
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| 3 | South Carolina |
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| 52 | Southern Porcelain Manufacturing Company |
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| 1 | Spain |
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| 47 | Star Porcelain Company |
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| 1 | Steel Towers |
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| 16 | Sterling Glass Company |
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| 1 | Stockton, CA |
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| 24 | Strain Insulator |
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| 27 | Strike |
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| 1 | Summit Porcelain Company |
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| 5 | Sun Porcelain Company |
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| 48 | Suspension |
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| 4 | Switzerland |
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| 53 | Sydenham Glass Company |
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| 1 | Syracuse |
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| 1 | Syracuse, Lake Shore & Northern Railway |
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| 10 | Telluride |
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| 50 | Third Rail Insulator |
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| 1 | Thomas 6T |
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| 84 | Thomas China Company |
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| 1 | Three Rivers |
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| 1 | Tibbatts |
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| 11 | Tid Bits |
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| 3 | Tiffin Pottery |
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| 9 | Timberlake |
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| 1 | Tireless Insulator Company |
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| 1 | To Do |
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| 1 | Tonawanda |
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| 2 | Toronto |
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| 20 | Torrance Glass & Color Works |
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| 3 | Transposition |
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| 44 | Tree Insulator |
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| 2 | Trenton China Company |
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| 1 | Trenton Fire Clay & Porcelain Company |
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| 17 | Trenton Porcelain Company |
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| 8 | Trenton Potteries Company |
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| 1 | Trimble Patent Insulator Company |
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| 1 | Trolley |
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| 59 | Trolley Insulator |
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| 1 | Trumbull Electric Manufacturing Company |
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| 4 | Tube |
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| 25 | United States Electric Porcelain Company |
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| 38 | United States Glass Company |
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| 1 | United States Insulator Company |
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| 4 | United States Porcelain Company |
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| 11 | United States Pottery Company |
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| 7 | Unity Insulator |
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| 3 | Universal Clay Products Company |
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| 3 | Universal Specialty Company |
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| 9 | Unknown |
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| 1 | Unknown Porcelain Plant by Trenton Men |
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| 6 | Utah |
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| 1 | Vail |
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| 54 | Valverde Glass Works |
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| 6 | Vandalism |
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| 21 | Varley |
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| 1 | Victor Insulators |
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| 19 | Victor Insulators, Incorporated |
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| 3 | Victor Tree Insulator |
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| 5 | Vidriera Monterey |
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| 1 | Virginia |
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| 4 | Virginia Matthews |
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| 16 | Virginia Potteries Company |
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| 1 | Vulcanite Mfg. Company |
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| 1 | Wade Insulator |
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| 1 | Wages |
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| 33 | Wagner Glass Company |
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| 6 | Wagner Glass Works |
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| 2 | Waipori |
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| 1 | Walker |
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| 1 | Walker Mining & Manufacturing Company |
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| 1 | Wall Bushing |
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| 16 | Wall Tube |
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| 1 | Walter T. Goddard |
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| 2 | Wannopee Pottery Company |
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| 1 | War |
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| 1 | Ward Insulator |
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| 3 | Warren Kimble |
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| 14 | Washington |
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| 4 | Washington Porcelain Company |
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| 4 | Washington Pottery |
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| 1 | Webb |
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| 6 | Wedding |
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| 1 | West Virginia Glass Works |
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| 7 | Western Electric Company |
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| 3 | Western Electric Manufacturing Company |
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| 1 | Western Electrical Porcelain Company |
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| 25 | Western Flint Glass Company |
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| 1 | Western Glass Association |
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| 79 | Western Glass Manufacturing Company |
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| 2 | Western States Porcelain Company |
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| 31 | Western Union Telegraph Company |
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| 33 | Westinghouse |
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| 1 | Westinghouse Electric Company |
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| 35 | Westinghouse Glass Manufacturing Company |
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| 4 | Westinghouse High Voltage Insulator Company |
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| 1 | Westinghouse System |
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| 2 | Wetern Union Telegraph Company |
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| 3 | Wheeling Tile Company |
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| 228 | Whitall Tatum Company |
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| 1 | Whitall-Tatum Company |
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| 1 | White Glaze |
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| 2 | Whitney Glass Works |
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| 1 | Willamette |
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| 1 | Willamette Falls Electric Company |
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| 1 | Willamette River |
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| 1 | Willard P. Zimmerman |
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| 2 | Willard Paul Zimmerman |
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| 1 | Willets Manufacturing Company |
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| 1 | William Brooke |
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| 11 | William Brookfield |
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| 5 | William Brunt |
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| 48 | William Brunt Pottery Company |
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| 28 | William Brunt and Company |
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| 4 | William F. Modes |
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| 2 | William H. Farrar |
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| 1 | William J. Miller |
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| 1 | William Miller Machinery |
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| 1 | Winnepeg |
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| 3 | Winnipeg |
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| 1 | Winooski Vermont |
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| 2 | Wirt |
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| 3 | Wirt Manufacturing Company |
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| 1 | Wisconsin |
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| 1 | Witch's Hat Insulator |
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| 1 | Wood |
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| 1 | Wood Block |
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| 1 | Wooden Cleat |
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| 6 | Wooden Insulator |
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| 2 | Woolbert Insulator |
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| 3 | Worchester Polytechnic Institute |
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| 4 | World's Fair |
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| 47 | Wormser Glass Company |
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| 1 | Yadkin River |
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| 1 | Yandell |
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| 1 | Yockel |
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| 1 | Yuba River |
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| 1 | Z. C. Robbins |
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| 1 | Z. G. Simmons |
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| 1 | Zurich |
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| 3 | incomplete |
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