Granted Patent
Utility
US 6,173,985 · App. 09/258,979
Trailer hitch assembly with an interchangeable ball
Inventor:
William J. Thomas
Patented Case
View Patent ↗
Granted: Jan 16, 2001
Filed: Feb 26, 1999
Inventor
William J. Thomas
Assignee (at issue)
Valley Industries, L.L.C.
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.