Granted Patent
Utility
US 3,972,421 · App. 05/569,444
Car coupler
Inventor:
Kenneth L. DePenti
Patented Case
View Patent ↗
Granted: Aug 3, 1976
Filed: Apr 18, 1975
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.