Granted Patent
Utility
US 4,416,129 · App. 06/270,501
Cylinder lock with key removable plug
Inventor:
Robert P. Thimot
Patented Case
View Patent ↗
Granted: Nov 22, 1983
Filed: Jun 4, 1981
Inventor
Robert P. Thimot
Assignee (at issue)
HUDSON LOCK, LLC
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.