Granted Patent
Utility
US 5,166,578 · App. 07/717,860
Inverter power supply circuit
Inventor:
Ole K. Nilssen
Patented Case
View Patent ↗
Granted: Nov 24, 1992
Filed: Jun 19, 1991
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.