Granted Patent
Utility
US 4,613,149 · App. 06/699,354
Self-coupling trailer hitch
Inventor:
Thomas M. Williams, Jr.
Patented Case
View Patent ↗
Granted: Sep 23, 1986
Filed: Feb 7, 1985
Inventor
Thomas M. Williams, Jr.
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.