Granted Patent
Utility
US 5,861,735 · App. 08/027,151
Switching power supply circuit
Inventor:
Takahito Uchida
Patented Case
View Patent ↗
Granted: Jan 19, 1999
Filed: Feb 20, 1998
Inventor
Takahito Uchida
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.