Granted Patent
Utility
US 6,309,321 · App. 09/635,467
Fully-locking torque-proportioning differential
Inventor:
Paul J. Valente
Patented Case
View Patent ↗
Granted: Oct 30, 2001
Filed: Aug 11, 2000
Inventor
Paul J. Valente
Assignee (at issue)
Tractech Inc.
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.