Granted Patent
Utility
US 4,498,355 · App. 06/371,034
Self locking differential
Inventor:
Carl E. Schou
Patented Case
View Patent ↗
Granted: Feb 12, 1985
Filed: Apr 22, 1982
Inventor
Carl E. Schou
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.