Granted Patent
Utility
US 4,892,002 · App. 07/228,206
Articulated steering driveshaft
Inventor:
John L. Groat
Patented Case
View Patent ↗
Granted: Jan 9, 1990
Filed: Aug 4, 1988
Inventor
John L. Groat
Assignee (at issue)
Ford Motor Company
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.