Granted Patent
Utility
US 4,374,450 · App. 06/260,456
Method of making an igniter plug with nickel coating on center electrode
Inventors:
Gilbert G. Warren, Colin A. Johnson
Patented Case
View Patent ↗
Granted: Feb 22, 1983
Filed: May 4, 1981
Inventors
Gilbert G. Warren
Colin A. Johnson
Assignee (at issue)
Bendix 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.