Granted Patent
Utility
US 4,375,894 · App. 06/158,961
Hitch head having jaws and lock block with cooperating tapered surfaces
Inventor:
James C. Hammonds
Patented Case
View Patent ↗
Granted: Mar 8, 1983
Filed: Jun 12, 1980
Inventor
James C. Hammonds
Assignee (at issue)
ACF Industries Incorporated
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.