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 = '191') AND (category.subclass = '42') ORDER BY date ASC, patent, type

Total of 8 patents found where: Class is '191'; Subclass is '42';

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
 1891
U 448,703 March 24, 1891 Support for Electric Line Wires
Hanger insulator for trolley conductor		 WIRT, Herbert C.
 Hanger  
U 452,523 May 19, 1891 Electric Insulator
Cone of wood with metal shield for trolley wire hanger		 JENNINGS, Byron
 Wood 1/2 to James Brusie
U 463,824 November 24, 1891 Trolley Wire Hanger
Trolley wire hanger with insulator with threads on inside and outside to screw into bell		 BIRDSALL, Edward T.
SERRELL, Lemuel William
 Hanger  
 1893
U 503,039 August 8, 1893 Conductor Support and Insulator
miscellaneous wire support for underground trolley wire & insulator with hole in crown		 ESSICK, William B.
 Miscellaneous  
 1897
U 579,725 March 30, 1897 Insulator and Holder for Electric Railways
Trolley hanger insulator suspended from a cable. It is composed of an inverted insulator cup and a metal cover.		 KEITHLY, Willie C.
 Trolley Hanger  
 1908
U Specimen known 880,203 February 25, 1908 Insulator
Suspension insulator with petticoat		 DUNCAN, John D. E.
 Suspension  
U 899,859 September 29, 1908 Aerial Trolley Support
Metal pole arm to support trolley hanger insulators		 BRYAN, James
ETHERIDGE, Harry
BALSINGER, Edgar McCormack
 Hanger  
 1915
U 1,139,142 May 11, 1915 Locking Clip
Locking clip for an Electrose hanger insulator		 STEINBERGER, Louis
 Hanger  

Total of 0.02 seconds