Granted Patent
Utility
US 4,577,530 · App. 06/582,395
Differential cross shaft retaining means
Inventor:
John L. Hickey
Patented Case
View Patent ↗
Granted: Mar 25, 1986
Filed: Feb 24, 1984
Inventor
John L. Hickey
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.