Granted Patent
Utility
US 6,459,213 · App. 07/864,044
Ballast for parallel-connected lamps
Inventor:
Ole K. Nilssen
Patented Case
View Patent ↗
Granted: Oct 1, 2002
Filed: Apr 6, 1992
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.