Granted Patent
Utility
US 6,170,458 · App. 09/330,050
Insulator shield for spark plug
Inventor:
Kevin L. Miller
Patented Case
View Patent ↗
Granted: Jan 9, 2001
Filed: Jun 11, 1999
Inventor
Kevin L. Miller
Assignee (at issue)
Cooper Automotive Products, 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.