Granted Patent
Utility
US 4,469,208 · App. 06/332,232
Control for differential lock
Inventor:
Kenneth N. Hansen
Patented Case
View Patent ↗
Granted: Sep 4, 1984
Filed: Dec 18, 1981
Inventor
Kenneth N. Hansen
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.