Issued Patents 2004
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6834349 | Copyright protection system for data storage and transmission | Takayuki Sugahara | 2004-12-21 |
| 6735375 | Data recording and reproducing apparatus | Jin Ogasawara | 2004-05-11 |