|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 = '313') AND (category.subclass = '325') ORDER BY patent ASC, type|
Total of 12 patents found where: Class is '313'; Subclass is '325';
View a patent by clicking on the patent number. You can sort by any of the columns by clicking on the column name.
|T / S||Patent||Date||Description||Patentee||Category||Assigned To|
|R||9,484||November 30, 1880||Telegraph Insulator
Hook with metal case secured to crossarm (see 75,889)
|FINN, John L.
||Hook||Amzi S. Dodd and Chinnock Electric Co.|
|U||63,206||March 26, 1867||Improvement in Insulators for Telegraph Wires
Hook encased in metal or wood allows arcing to ground
|U||280,324||June 26, 1883||Combined Insulator and Lightning arrester
Combined insulator and lightning arrestor
|NOBLE, John E.
||Lightning Arrestor||1/6 to Charles J. Leming|
|U||880,203||February 25, 1908||Insulator
Suspension insulator with petticoat
|DUNCAN, John D. E.
|U||883,303||March 31, 1908||Security Lightning Arrester
Lightning rod with multiple separate points arranged along the conductor on the edges of the roof
|DRAKE, William E.
||Lightning Rod Point|
|U||1,001,137||August 22, 1911||Insulator Protector
Arcing device attached to top and bottom of insulator
|GODDARD, Walter T.
||Arcing||Locke Insulator Mfg. Co.|
|U||1,015,224||January 16, 1912||Insulator
Suspension insulator of insulating rope, hoods, and arcing rods. [This looks very close to the handful of glass suspension insulators found in 2002 in northern CA by Paul Greaves and Mike Spadafora. The glass was most probably made by Hemingray. No markin
|U||1,128,424||February 16, 1915||Insulator
Suspension multipart insulator fitted with arcing horns
|DUNCAN, John D. E.
|U||1,273,015||July 16, 1918||Electric Insulator
Suspension made of several parts bolted together
|THOMAS, Percy H.
|U||1,283,651||November 5, 1918||Lightning Arrester
Lightning arrester with hole through top of insulator similar to U-70.
|BUCHANAN, Sutton R.
|U||1,947,321||February 13, 1934||Arcing Horn for Insulators
Arcing horns for Hewlett or other suspension insulator string
|VINCENT, Harold Blanchard
SLEEMAN, Harold Parker
|Suspension||The R. Thomas & Sons Co.|
|U||2,011,136||August 13, 1935||Protective Apparatus
Arcing gap using flux control insulators
|AUSTIN, Arthur O.
||Arc Gap||The Ohio Brass Co.|
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