Issued Patents 2004
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6815030 | Optical information recording medium | Takeshi Kakuta, Shinichi Kato | 2004-11-09 |
| 6808782 | Optical information recording medium | Yoshihisa Usami | 2004-10-26 |
| 6800347 | Optical information recording medium | Naoki Saito | 2004-10-05 |
| 6699591 | Optical information recording medium | Takeshi Kakuta | 2004-03-02 |