Granted Patent
Utility
US 5,402,043 · App. 08/126,706
Controlled driven series-resonant ballast
Inventor:
Ole K. Nilssen
Patented Case
View Patent ↗
Granted: Mar 28, 1995
Filed: Sep 23, 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.