Granted Patent
Utility
US 6,498,957 · App. 09/432,162
Power supply control in portable data terminal
Inventor:
Masakazu Umetsu
Patented Case
View Patent ↗
Granted: Dec 24, 2002
Filed: Nov 2, 1999
Inventor
Masakazu Umetsu
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.