Granted Patent
Utility
US 5,169,168 · App. 07/687,631
Ball hitch assembly
Inventors:
Edward G. Harry, Donald R. Schneider
Patented Case
View Patent ↗
Granted: Dec 8, 1992
Filed: Apr 19, 1991
Inventors
Edward G. Harry
Donald R. Schneider
Assignee (at issue)
Harwal Machine, Inc.
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.