Granted Patent
Utility
US 4,304,545 · App. 06/100,287
Fuel supply and ignition control system employing flame sensing via spark electrodes
Inventor:
Russell B. Matthews
Patented Case
View Patent ↗
Granted: Dec 8, 1981
Filed: Dec 5, 1979
Inventor
Russell B. Matthews
Assignee (at issue)
Johnson Controls, 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.