Granted Patent
Utility
US 6,728,889 · App. 09/593,459
Password recognition circuit and security checking method
Inventor:
Motoharu Wada
Patented Case
View Patent ↗
Granted: Apr 27, 2004
Filed: Jun 14, 2000
Inventor
Motoharu Wada
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.