Issued Patents 2004
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6819642 | Data recording device, data reproducing device, and optical disc | Satoshi Kumai, Tetsuji Kawashima, Kenji Nagashima, Toshio Morizumi | 2004-11-16 |
| 6757227 | Optical drive apparatus for use with different recording media, tracking control method for use therein, and optical disc | Kenji Nagashima, Toshio Morizumi | 2004-06-29 |
| 6714509 | Disk recording medium and disk drive apparatus | Yukio Shishido, Michihiko Iida | 2004-03-30 |