Issued Patents 2004
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6733858 | Optical recording medium and optical recording method therefor | Jiro Yoshinari | 2004-05-11 |
| 6677104 | Optical information medium | Hiroyasu Inoue, Hiroshi Shingai, Hajime Utsunomiya | 2004-01-13 |