Granted Patent
Utility
US 4,468,994 · App. 06/310,232
Key cutting device
Inventor:
Nathan S. Lieptz
Patented Case
View Patent ↗
Granted: Sep 4, 1984
Filed: Sep 3, 1981
Inventor
Nathan S. Lieptz
Assignee (at issue)
CONGOLEUM 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.