Granted Patent
Utility
US 4,475,030 · App. 06/527,778
Glow plug having resiliently mounted ceramic surface-ignition element
Inventor:
John M. Bailey
Patented Case
View Patent ↗
Granted: Oct 2, 1984
Filed: Sep 25, 1981
Inventor
John M. Bailey
Assignee (at issue)
Caterpillar Tractor Co.
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.