Granted Patent
Utility
US 4,920,939 · App. 07/316,191
Position sensor monitoring system
Inventor:
Allan Roy Gale
Patented Case
View Patent ↗
Granted: May 1, 1990
Filed: Feb 27, 1989
Inventor
Allan Roy Gale
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.