Granted Patent
Utility
US 4,263,652 · App. 05/881,985
Oxygen sensor signal conditioner
Inventor:
Robert S. Henrich
Patented Case
View Patent ↗
Granted: Apr 21, 1981
Filed: Feb 27, 1978
Inventor
Robert S. Henrich
Assignee (at issue)
Bendix Limited
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.