Granted Patent
Utility
US 6,438,694 · App. 09/768,287
Apparatus for data copyright management system
Inventor:
Makoto Saito
Patented Case
View Patent ↗
Granted: Aug 20, 2002
Filed: Jan 25, 2001
Inventor
Makoto Saito
Assignee (at issue)
MITSUBISHI 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.