Granted Patent
Utility
US 6,272,635 · App. 09/546,177
Data copyright management system
Inventor:
Makoto Saito
Patented Case
View Patent ↗
Granted: Aug 7, 2001
Filed: Apr 10, 2000
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.