Granted Patent
Utility
US 4,296,399 · App. 06/064,020
Microminiature palladium oxide gas detector and method of making same
Inventor:
Frank T. John
Patented Case
View Patent ↗
Granted: Oct 20, 1981
Filed: Aug 6, 1979
Inventor
Frank T. John
Assignee (at issue)
ATO BV
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.