Issued Patents 1997
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5693421 | Information recording medium and information recording and reproducing method | Hironori Kamiyama | 1997-12-02 |
| 5677063 | Information recording medium and information recording and reproducing method | Hironori Kamiyama | 1997-10-14 |