Granted Patent
Utility
US 4,953,371 · App. 07/448,219
Shackleless padlock
Inventor:
Paul Appelbaum
Patented Case
View Patent ↗
Granted: Sep 4, 1990
Filed: Dec 11, 1989
Inventor
Paul Appelbaum
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.