Granted Patent
Utility
US 4,526,022 · App. 06/459,657
Keylock with resettable, bendable lever tumblers
Inventor:
Joseph J. Parrock
Patented Case
View Patent ↗
Granted: Jul 2, 1985
Filed: Jan 21, 1983
Inventor
Joseph J. Parrock
Assignee (at issue)
American Standard 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.