Granted Patent
Utility
US 4,717,166 · App. 07/020,385
Hook type quick coupling for tractor implement
Inventor:
Bertrand Vachon
Patented Case
View Patent ↗
Granted: Jan 5, 1988
Filed: Mar 2, 1987
Inventor
Bertrand Vachon
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.