Granted Patent
Utility
US 5,176,590 · App. 07/736,838
Planetary locking differential
Inventor:
Stephen J. Haydock
Patented Case
View Patent ↗
Granted: Jan 5, 1993
Filed: Jul 29, 1991
Inventor
Stephen J. Haydock
Assignee (at issue)
DANA LIMITED
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.