Granted Patent
Utility
US 4,288,190 · App. 06/087,581
Two-piece grooved pin retainer
Inventor:
Samuel L. Benson
Patented Case
View Patent ↗
Granted: Sep 8, 1981
Filed: Oct 22, 1979
Inventor
Samuel L. Benson
Assignee (at issue)
J. I. Case Company
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.