Granted Patent
Utility
US 5,177,675 · App. 07/778,311
Zero voltage, zero current, resonant converter
Inventor:
Michael Archer
Patented Case
View Patent ↗
Granted: Jan 5, 1993
Filed: Oct 16, 1991
Inventor
Michael Archer
Assignee (at issue)
Shindengen Archer Corp.
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.