Granted Patent
Utility
US 4,424,691 · App. 06/354,815
Pull-resistant cylinder lock
Inventor:
William R. Foshee
Patented Case
View Patent ↗
Granted: Jan 10, 1984
Filed: Mar 4, 1982
Inventor
William R. Foshee
Assignee (at issue)
Best Lock Corporation
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.