Issued Patents 2004
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6798733 | Optical recording method and medium | Hiroyasu Inoue, Tatsuya Kato, Hiroshi Shingai | 2004-09-28 |
| 6677104 | Optical information medium | Tetsuro Mizushima, Hiroyasu Inoue, Hiroshi Shingai | 2004-01-13 |