Granted Patent
Utility
US 4,850,765 · App. 07/134,402
Self-locking tool and socket
Inventor:
Valdas S. Ramunas
Patented Case
View Patent ↗
Granted: Jul 25, 1989
Filed: Dec 17, 1987
Inventor
Valdas S. Ramunas
Assignee (at issue)
KENNAMETAL INC.
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.