|SELECT DISTINCT patent.*, YEAR(date) as year FROM patent WHERE (category = 'Trolley Hanger') ORDER BY type ASC, date, patent|
Total of 2 patents found where: Category is 'Trolley Hanger';
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|
|U||576,392||February 2, 1897||Insulator
|BILLINGS, Harry E.
||Trolley Hanger||The Billings & Spencer Co.|
|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.
Total of 0.01 seconds