Granted Patent
Utility
US 4,344,639 · App. 06/154,206
Dual implement hitch
Inventor:
Lorne R. Pollard
Patented Case
View Patent ↗
Granted: Aug 17, 1982
Filed: May 29, 1980
Inventor
Lorne R. Pollard
Assignee (at issue)
International Harvester Company
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.