Granted Patent
Utility
US 4,986,608 · App. 07/224,656
High torque capacity axle shaft
Inventor:
Gregory A. Fett
Patented Case
View Patent ↗
Granted: Jan 22, 1991
Filed: Jul 27, 1988
Inventor
Gregory A. Fett
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.