Granted Patent
Utility
US 4,897,008 · App. 07/258,871
Anti-tamper nut
Inventor:
Jeffery R. Parks
Patented Case
View Patent ↗
Granted: Jan 30, 1990
Filed: Oct 17, 1988
Inventor
Jeffery R. Parks
Assignee (at issue)
McGard 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.