Granted Patent
Utility
US 5,297,647 · App. 08/033,728
Variable assist power steering gear with hydraulic reaction controls
Inventor:
James J. Duffy
Patented Case
View Patent ↗
Granted: Mar 29, 1994
Filed: Mar 18, 1993
Inventor
James J. Duffy
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.