Granted Patent
Utility
US 4,197,082 · App. 05/896,699
Fuel ignition control arrangement employing dual flame sensors
Inventor:
Russell B. Matthews
Patented Case
View Patent ↗
Granted: Apr 8, 1980
Filed: Apr 17, 1978
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.