Issued Patents 2002
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6462263 | Information recording medium and reproducing apparatus therefor | Dai Ishikawa, Hidekazu Yoshida, Kazuyuki Uchiyama | 2002-10-08 |
| 6388951 | Audio apparatus | Dai Ishikawa, Hidekazu Yoshida, Michiaki Hamada, Chiharu Akaishi | 2002-05-14 |