Issued Patents 2002
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6466920 | Method and system for preventing illegal use of digital contents, processing program thereof, and recording medium for the program | Nobuya Okayama, Taminori Tomita, Shigeru Arai | 2002-10-15 |