Granted Patent
Utility
US 4,597,523 · App. 06/620,307
Carrier lock
Inventor:
Richard L. Schuster
Patented Case
View Patent ↗
Granted: Jul 1, 1986
Filed: Jun 13, 1984
Inventor
Richard L. Schuster
Assignee (at issue)
Manville Service 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.