Granted Patent
Utility
US 4,298,336 · App. 06/073,673
Pilot burner ignition means and method of making the same
Inventor:
Fred Riehl
Patented Case
View Patent ↗
Granted: Nov 3, 1981
Filed: Sep 10, 1979
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.