Granted Patent
Utility
US 6,089,591 · App. 08/993,249
Ball assembly for a trailer hitch
Inventor:
Charles Thomas
Patented Case
View Patent ↗
Granted: Jul 18, 2000
Filed: Dec 18, 1997
Inventor
Charles 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.