Granted Patent
Utility
US 4,901,599 · App. 07/291,506
Cross pin retainer block for a bevel gear differential
Inventor:
Earl James Irwin
Patented Case
View Patent ↗
Granted: Feb 20, 1990
Filed: Dec 29, 1988
Inventor
Earl James Irwin
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.