Granted Patent
Utility
US 6,408,390 · App. 09/375,000
Apparatus for data copyright management system
Inventor:
Makoto Saito
Patented Case
View Patent ↗
Granted: Jun 18, 2002
Filed: Aug 16, 1999
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.