Granted Patent
Utility
US 5,691,464 · App. 08/796,084
Apparatus for high oxygen concentration measurement using limiting current oxygen sensor
Inventor:
Tuan Q. Cao
Patented Case
View Patent ↗
Granted: Nov 25, 1997
Filed: Feb 5, 1997
Inventor
Tuan Q. Cao
Assignee (at issue)
Litton Systems, Inc.
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.