Granted Patent
Utility
US 4,535,651 · App. 06/645,480
Torque proportioning differential
Inventor:
Robert O. Chambers
Patented Case
View Patent ↗
Granted: Aug 20, 1985
Filed: Aug 13, 1982
Inventor
Robert O. Chambers
Assignee (at issue)
Caterpillar Tractor Co.
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.