Granted Patent
Utility
US 5,757,628 · App. 08/790,968
Stabilized high frequency switching power supply with suppressed EMI noise
Inventor:
Hisahiro Kamata
Patented Case
View Patent ↗
Granted: May 26, 1998
Filed: Jan 29, 1997
Inventor
Hisahiro Kamata
Assignee (at issue)
Tohoku Ricoh Co., Ltd.
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.