Issued Patents 2004
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6804188 | Data recording medium, data recording apparatus and method, and data reproducing apparatus and method | Yukio Shishido, Tetsuji Kawahima, Yoichiro Sako, Tatsuya Inokuchi, Katsumi Toyama | 2004-10-12 |
| 6785213 | Disk drive apparatus, and disk formatting method | Yukio Shishido, Osamu Udagawa | 2004-08-31 |