Granted Patent
Utility
US 5,209,317 · App. 07/781,654
Electro-hydraulic vehicular power steering system with closed center valving
Inventor:
Steven H. Schnelle
Patented Case
View Patent ↗
Granted: May 11, 1993
Filed: Aug 17, 1990
Inventor
Steven H. Schnelle
Assignee (at issue)
United Technologies Automotive
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.