Granted Patent
Utility
US 6,452,314 · App. 09/478,161
Spark plug having a protective titanium thereon, and methods of making the same
Inventor:
Jeffrey T. Boehler
Patented Case
View Patent ↗
Granted: Sep 17, 2002
Filed: Jan 5, 2000
Inventor
Jeffrey T. Boehler
Assignee (at issue)
HONEYWELL INTERNATIONAL 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.