Granted Patent
Utility
US 5,228,426 · App. 07/967,314
Oxygen sensor system with an automatic heater malfunction detector
Inventors:
Ross Dykstra Pursifull, Julie A. Konrad, Robert William Ridgway
Patented Case
View Patent ↗
Granted: Jul 20, 1993
Filed: Oct 28, 1992
Inventors
Ross Dykstra Pursifull
Julie A. Konrad
Robert William Ridgway
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.