Granted Patent
Utility
US 4,319,645 · App. 06/217,533
Variable speed plow with moldboard pivoting about a forward vertical pivot axis
Inventor:
David S. Totten
Patented Case
View Patent ↗
Granted: Mar 16, 1982
Filed: Dec 15, 1980
Inventor
David S. Totten
Assignee (at issue)
Allis-Chalmers Corporation
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.