Granted Patent
Utility
US 5,325,711 · App. 08/088,296
Air-fuel modulation for oxygen sensor monitoring
Inventors:
Douglas R. Hamburg, Thomas Scott Gee, Thomas Schubert, Paul F. Smith
Patented Case
View Patent ↗
Granted: Jul 5, 1994
Filed: Jul 6, 1993
Inventors
Douglas R. Hamburg
Thomas Scott Gee
Thomas Schubert
Paul F. Smith
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.