Granted Patent
Utility
US 4,422,073 · App. 06/315,684
Combustible gas detection system
Inventor:
Joe K. Winner
Patented Case
View Patent ↗
Granted: Dec 20, 1983
Filed: Oct 27, 1981
Inventor
Joe K. Winner
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.