Granted Patent
Utility
US 5,131,894 · App. 07/661,769
Axle shaft retainer of use in differential case
Inventor:
Gregory J. Hilker
Patented Case
View Patent ↗
Granted: Jul 21, 1992
Filed: Feb 27, 1991
Inventor
Gregory J. Hilker
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.