Issued Patents 2004
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6816334 | Information recording and reproducing device and tracking servo system therefor | Kunio Kojima, Hiroyuki Katayama | 2004-11-09 |
| 6804822 | Magnetic recording medium and magnetic recording apparatus using same | Junichi Sato, Kunio Kojima, Hiroyuki Katayama, Hiroshi Fuji, Kenji Ohta | 2004-10-12 |