Issued Patents 2004
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6816972 | Disk recording medium, reproduction device and method for performing reproduction on disk recording medium | Ken Kutaragi, Eiji Kawai | 2004-11-09 |
| 6724693 | Optical disk having readable information on both sides of the disk combination with an optical disk device | Ken Kutaragi | 2004-04-20 |
| 6721264 | Optical recording medium and entertainment system that employs it | Ken Kutaragi | 2004-04-13 |