Granted Patent
Utility
US 4,691,136 · App. 06/946,879
Insulator assembly for electrode of piezoelectric ignition device
Inventor:
Frank T. Schmidt
Patented Case
View Patent ↗
Granted: Sep 1, 1987
Filed: Dec 29, 1986
Inventor
Frank T. Schmidt
Assignee (at issue)
The Coleman Company, 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.