Granted Patent
Utility
US 5,739,622 · App. 08/692,279
Converter wherein a piezoelectric transformer input signal is frequency modulated by a pulse width modulated signal
Inventor:
Toshiyuki Zaitsu
Patented Case
View Patent ↗
Granted: Apr 14, 1998
Filed: Aug 5, 1996
Inventor
Toshiyuki Zaitsu
Assignee (at issue)
NEC CORPORATION
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.