Granted Patent
Utility
US 4,492,027 · App. 06/485,738
Rotary hand knife
Inventor:
Louis A. Bettcher
Patented Case
View Patent ↗
Granted: Jan 8, 1985
Filed: Apr 18, 1983
Inventor
Louis A. Bettcher
Assignee (at issue)
Bettcher Industries, 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.