Granted Patent
Utility
US 4,286,523 · App. 06/074,688
System for supporting overhead trolley rail
Inventor:
Neal W. Densmore
Patented Case
View Patent ↗
Granted: Sep 1, 1981
Filed: Sep 12, 1979
Inventor
Neal W. Densmore
Assignee (at issue)
Voy Manufacturing Co.
This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.