Granted Patent
Utility
US 4,398,405 · App. 06/249,165
Lock with key-controlled removable and installable plug and key for same
Inventor:
George P. Patriquin
Patented Case
View Patent ↗
Granted: Aug 16, 1983
Filed: Mar 30, 1981
Inventor
George P. Patriquin
Assignee (at issue)
Product Concepts, Ltd.
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.