Granted Patent
Utility
US 4,942,935 · App. 07/380,000
Auxiliary power steering system
Inventor:
Richard J. Lech
Patented Case
View Patent ↗
Granted: Jul 24, 1990
Filed: Jul 14, 1989
Inventor
Richard J. Lech
Assignee (at issue)
J. I. Case 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.