Search the Insulator Patent Reference Library:

Build your search criteria. The patent must match all the values specified.
Select patent types: Utility   Design   Reissue
Patent number:
Date:
Year between: and
Patentee starting with:
City:
State:
Assigned To starting with:
Description containing:
Category:
Class:    Subclass:
Click Search when complete:
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 = '43') ORDER BY date ASC, patent, type

Total of 8 patents found where: Class is '174'; Subclass is '43';

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
 1883
U Specimen known 289,890 December 11, 1883 Telegraph and Telephone Conductor
Lightning rod insulator system to protect telephone lines from cross talk		 CHAMBERS, Josephus C.
 Lightning Rod Insulator Vine, Jackson, Gridley
 1892
U 477,753 June 28, 1892 Insulator
Clamp type		 GOOLD, Frederick D'A
 Clamp Type The Edison General Electric Co.
 1909
U Specimen known 925,561 June 22, 1909 Suspension of High Tension Lines
Suspension system for high tension transmission		 BUCK, Harold W.
HEWLETT, Edward M.
 Suspension General Electric Co.
 1919
U 1,326,307 December 30, 1919 Method of and Means for Supporting Electric Conductors
Rod type insulators used as suspension insulators for high voltage conductors.		 THOMAS, Percy H.
 Suspension  
 1929
U 1,702,235 February 12, 1929 System of Line Insulation and Insulators Therefor
Odd Electrose insulator		 STEINBERGER, Louis
 Insulator  
 1942
U 2,305,069 December 15, 1942 Means of Attaching Service Wires
Circular bracket that fits under an insulator or rack spool with holes to allow easy dropping of wires connected to the line		 EMGE, Paul W.
 Bracket  
 1950
U Specimen known 2,517,221 August 1, 1950 Secondary and Service Rack Insulator
Knob - specimens exist called ""pencil holder""		 LOUX, Raymond A.
 Knob  
 1960
U Specimen known 2,921,112 January 12, 1960 Electric Conductor Strand Separator Insulator
Spacer for conductors		 DYKSTRA, Laurence J.
GRILLS, Lee J.
 Spacer The Porcelain Insulator Corp.

Total of 0.00 seconds