Granted Patent
Utility
US 4,718,259 · App. 07/006,334
Keysafe
Inventor:
Paul Appelbaum
Patented Case
View Patent ↗
Granted: Jan 12, 1988
Filed: Feb 2, 1987
Inventor
Paul Appelbaum
Assignee (at issue)
Hampton Lock Co., 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.