Granted Patent
Utility
US 5,850,335 · App. 08/829,785
Isolation-type switching power supply
Inventor:
Tetushi Otake
Patented Case
View Patent ↗
Granted: Dec 15, 1998
Filed: Mar 31, 1997
Inventor
Tetushi Otake
Assignee (at issue)
Toko 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.