Granted Patent
Utility
US 5,428,264 · App. 08/015,584
Electronic ballast with controlled operating voltage
Inventor:
Ole K. Nilssen
Patented Case
View Patent ↗
Granted: Jun 27, 1995
Filed: Feb 10, 1993
Inventor
Ole K. Nilssen
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.