Granted Patent
Utility
US 5,363,091 · App. 07/741,881
Catalyst monitoring using ego sensors
Inventors:
Allan Joseph Kotwicki, Douglas R. Hamburg
Patented Case
View Patent ↗
Granted: Nov 8, 1994
Filed: Aug 7, 1991
Inventors
Allan Joseph Kotwicki
Douglas R. Hamburg
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.