Granted Patent
Utility
US 6,191,505 · App. 09/175,972
On/off control device for power source unit
Inventor:
Hirotsugu Matsuyama
Patented Case
View Patent ↗
Granted: Feb 20, 2001
Filed: Oct 21, 1998
Inventor
Hirotsugu Matsuyama
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.