Granted Patent
Utility
US 5,831,849 · App. 08/625,545
Data control system
Inventor:
Toshiya Matsui
Patented Case
View Patent ↗
Granted: Nov 3, 1998
Filed: Apr 1, 1996
Inventor
Toshiya Matsui
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.