Granted Patent
Utility
US 4,236,644 · App. 06/121,931
Wearplate for the butt end of a coupler shank
Inventor:
Kenneth L. DePenti
Patented Case
View Patent ↗
Granted: Dec 2, 1980
Filed: Feb 15, 1980
Inventor
Kenneth L. DePenti
Assignee (at issue)
Midland-Ross Corporation
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.