Granted Patent
Utility
US 4,717,294 · App. 06/933,992
House-key code cutter
Inventor:
William Marvin Grasser, II
Patented Case
View Patent ↗
Granted: Jan 5, 1988
Filed: Nov 24, 1986
Inventor
William Marvin Grasser, II
Assignee (at issue)
Curtis Industries, LLC
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.