Granted Patent
Utility
US 5,459,375 · App. 08/326,197
Electronic ballast with high-frequency-aided power-factor-correction
Inventor:
Ole K. Nilssen
Patented Case
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Granted: Oct 17, 1995
Filed: Oct 20, 1994
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.