Issued Patents 2004
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6692809 | Optical recording medium | Seiro Oshima, Toshihiko Takishita | 2004-02-17 |
| 6687214 | Recording medium and apparatus and method for manufacturing the same | Masahiro Kato, Eiji Muramatsu, Atsushi Yamaguchi, Shoji Taniguchi, Seiro Oshima +3 more | 2004-02-03 |