Granted Patent
Utility
US 6,326,719 · App. 09/334,533
Spark plug shell having a bimetallic ground electrode spark plug incorporating the shell, and method of making same
Inventors:
Jeffrey T. Boehler, Gary B. Zulauf
Patented Case
View Patent ↗
Granted: Dec 4, 2001
Filed: Jun 16, 1999
Inventors
Jeffrey T. Boehler
Gary B. Zulauf
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.