Issued Patents 2003
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6657938 | Disk having expanded elapsed time information | Yoichiro Sako, Tetsuji Kawahima, Yukio Shishido, Shigeki Tsukatani, Tatsuya Inokuchi | 2003-12-02 |
| 6519217 | Data record medium, data recording and/or reproducing apparatus, and record medium determining method | Tetsuji Kawashima, Yoichiro Sako, Tatsuya Inokuchi, Shigeki Tsukatani, Yukio Shishido | 2003-02-11 |