Granted Patent
Utility
US 3,976,900 · App. 05/543,313
Gas ignition devices
Inventor:
Ronald A. Harrison
Patented Case
View Patent ↗
Granted: Aug 24, 1976
Filed: Jan 23, 1975
Inventor
Ronald A. Harrison
Assignee (at issue)
Plessey Handel Und Investments AG
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.