Granted Patent
Utility
US 4,470,613 · App. 06/442,321
Tractor hitches
Inventor:
Alec Sykes
Patented Case
View Patent ↗
Granted: Sep 11, 1984
Filed: Nov 17, 1982
Inventor
Alec Sykes
Assignee (at issue)
David Brown Tractors Ltd.
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.