Granted Patent
Utility
US 4,875,813 · App. 07/280,350
Wheel chock
Inventors:
Donald L. Moyer, Thomas O. Allred
Patented Case
View Patent ↗
Granted: Oct 24, 1989
Filed: Dec 6, 1988
Inventors
Donald L. Moyer
Thomas O. Allred
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.