Granted Patent
Utility
US 4,751,398 · App. 06/840,896
Lighting system for normal and emergency operation of high intensity discharge lamps
Inventor:
Alexander L. Ertz, III
Patented Case
View Patent ↗
Granted: Jun 14, 1988
Filed: Mar 18, 1986
Inventor
Alexander L. Ertz, III
Assignee (at issue)
The Bodine Company
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.