Granted Patent
Utility
US 6,832,721 · App. 09/968,881
Authentication system using information on position
Inventor:
Satoru Fujii
Patented Case
View Patent ↗
Granted: Dec 21, 2004
Filed: Oct 3, 2001
Inventor
Satoru Fujii
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.