Granted Patent
Utility
US 4,637,518 · App. 06/720,798
Coupler for a railway car coupler assembly
Inventor:
Richard M. Hanula
Patented Case
View Patent ↗
Granted: Jan 20, 1987
Filed: Apr 8, 1985
Inventor
Richard M. Hanula
Assignee (at issue)
Seher Acquisition Corp.
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.