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SELECT DISTINCT patent.*, YEAR(date) as year FROM patent LEFT JOIN category ON category.patent = patent.patent AND category.type = patent.type WHERE (category.class = '174') AND (category.subclass = '137R') ORDER BY date ASC, patent, type

Total of 17 patents found where: Class is '174'; Subclass is '137R';

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T / S Patent Date Description Patentee Category Assigned To
 1875
U 161,058 March 23, 1875 Improvement in Insulating Blocks for Telegraph Lines
Slotted block to hold several wires		 PIDGEON, George S.
 Slotted  
 1906
U 829,416 August 28, 1906 Third Rail Insulator
Third rail insulator with 2-part metal cap to secure the rail.		 MCGILL, John J.
 Third Rail 1/2 to Frank J. Guernsey
 1908
U 876,828 January 14, 1908 Insulator
Composition design of reinforced concrete		 MCNUTT, Ross C.
 Composition  
 1910
U Specimen known 964,737 July 19, 1910 Insulated Distributor for Electric Service Wires
Wireholder for multiple drop wires suspended under the crossarm		 ASHLEY, John B.
 Wireholder  
 1912
U 1,038,473 September 10, 1912 Insulator
Suspension insulator of insulating rope and hoods		 ALSBERG, Julius
 Suspension  
 1914
U 1,084,147 January 13, 1914 Support for Electric Service Wires
Bulbous insulator mounted on a crossarm pin to allow tie-off and running multiple service wires from the main power conductor		 HOPKINS, Guy
 Service Drop  
U 1,085,813 February 3, 1914 Insulator and Current Distributor
Miscellaneous style with attachment for multiple current distributors (see 1,043,321)		 KNUTZ, Ernest H.
 Miscellaneous  
U 1,116,631 November 10, 1914 Insulator
Self-tying slot top for slack wire use		 SCHISLER, Frank J.
 Self-tying Slot Top  
 1916
U 1,169,011 January 18, 1916 Insulator
Glass insulator with internal reinforcement for strength		 COOK, Harry A.
 Glass  
 1920
U 1,333,188 March 9, 1920 Manufacture of Hollow Articles from Horn
Manufacture of insulators from animal horn (see 1,227,680)		 SEGRE, Mario
 Horn  
U 1,360,896 November 30, 1920 Cemented Insulator
Multipart cementing procedure evacuate air from cement, coat with tar		 CREIGHTON, Elmer
 Multipart General Electric Co.
 1926
U 1,590,457 June 29, 1926 Method of Testing Insulators
Manufacturing method of cutting a plastic insulator body to inspect it internally then put the parts back together before drying and firing		 VAUPEL, Albert
 Manufacturing Westinghouse Electric & Mfg. Co.
 1931
U 1,796,427 March 17, 1931 Process and Apparatus for Testing Insulators
Apparatus to run a high voltage test on insulators (see 1,750,699 and 1,796,427)		 AUSTIN, Arthur O.
 Manufacturing The Ohio Brass Co.
 1940
U Specimen known 2,218,497 October 15, 1940 Electrical Insulator
Rubber pin type insulator (see 2,304,483)		 SMITH, Donald H.
WHEELER, Herbert H.
 Rubber Western Union Telegraph Co.
 1943
U 2,327,972 August 24, 1943 High Strength Ceramic Surface
Manufacturing method of using porcelain ""sand"" with a lower coefficient of expansion than the insulator body to rough up the surface and provide a strong cement joint without reducing the effectiveness of the compression glaze (see 2,337,691)		 STETTINIUS, Kenneth E.
DEWEY, Benjamin F.
 Manufacturing Lapp Insulator Co., Inc.
U 2,337,691 December 28, 1943 Method of Making High Strength Ceramic Surfaces
Method of manufacturing insulators using porcelain ""sand"" with a lower coefficient of expansion than the insulator body to rough up the surface and provide a strong cement joint without reducing the effectiveness of the compression glaze (see 2,327,972)		 STETTINIUS, Kenneth E.
DEWEY, Benjamin F.
 Manufacturing Lapp Insulator Co., Inc.
 1962
U 3,054,704 September 18, 1962 Insulator Assembly Method and Apparatus
Suspension, method of sealing cement to improve strength during curing		 RUOFF, George M.
 Suspension A. B. Chance Co.

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