Granted Patent
Utility
US 6,463,536 · App. 09/873,453
Data copyright management system
Inventor:
Makoto Saito
Patented Case
View Patent ↗
Granted: Oct 8, 2002
Filed: Jun 5, 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.