Granted Patent
Utility
US 4,466,789 · App. 06/545,668
Igniter/flame sensor assembly for gas burner
Inventor:
Fred Riehl
Patented Case
View Patent ↗
Granted: Aug 21, 1984
Filed: Oct 26, 1983
Inventor
Fred Riehl
Assignee (at issue)
ROBERTSHAW CONTROLS PRIVATE 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.