Granted Patent
Utility
US 4,414,463 · App. 06/303,004
Diesel glow-plug ignitor
Inventors:
John T. Petrik, Brooke N. Westover
Patented Case
View Patent ↗
Granted: Nov 8, 1983
Filed: Sep 17, 1981
Inventors
John T. Petrik
Brooke N. Westover
Assignee (at issue)
Sun Chemical Corporation
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.