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SELECT DISTINCT patent.*, YEAR(date) as year FROM patent LEFT JOIN name ON name.patent = patent.patent AND name.type = patent.type LEFT JOIN category ON category.patent = patent.patent AND category.type = patent.type WHERE (category.class = '191') AND (category.subclass = '42') ORDER BY last_name ASC, first_name, date, patent, type

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

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T / S Patent Date Description Patentee Category Assigned To
 BIRDSALL, Edward T.
SERRELL, Lemuel William
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  
 BRYAN, James
ETHERIDGE, Harry
BALSINGER, Edgar McCormack
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  
 DUNCAN, John D. E.
U Specimen known 880,203 February 25, 1908 Insulator
Suspension insulator with petticoat		 DUNCAN, John D. E.
 Suspension  
 ESSICK, William B.
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  
 JENNINGS, Byron
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
 KEITHLY, Willie C.
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  
 STEINBERGER, Louis
U 1,139,142 May 11, 1915 Locking Clip
Locking clip for an Electrose hanger insulator		 STEINBERGER, Louis
 Hanger  
 WIRT, Herbert C.
U 448,703 March 24, 1891 Support for Electric Line Wires
Hanger insulator for trolley conductor		 WIRT, Herbert C.
 Hanger  

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