Granted Patent
Utility
US 5,466,022 · App. 08/155,576
Safety cable lock for knob-operated door
Inventor:
Jay S. Derman
Patented Case
View Patent ↗
Granted: Nov 14, 1995
Filed: Nov 19, 1993
Inventor
Jay S. Derman
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.