Granted Patent
Utility
US 5,973,443 · App. 08/642,975
Spark plug electrode tip for internal combustion engine
Inventors:
Chin-Fong Chang, Michael S. Zedalis, Richard Dale Taylor, Edgar Arnold Leone
Patented Case
View Patent ↗
Granted: Oct 26, 1999
Filed: May 6, 1996
Inventors
Chin-Fong Chang
Michael S. Zedalis
Richard Dale Taylor
Edgar Arnold Leone
Assignee (at issue)
AlliedSignal, 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.