Granted Patent
Utility
US 4,555,211 · App. 06/504,337
Truck locking device
Inventor:
Donald L. Metz
Patented Case
View Patent ↗
Granted: Nov 26, 1985
Filed: Jun 14, 1982
Inventor
Donald L. Metz
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.