Issued Patents 2004
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6721248 | Optical disk unit | Tadao Yamanouchi, Yuichi Sakamoto, Yoshiyuki Ootsuka | 2004-04-13 |
| 6687207 | Optical recording apparatus for recording information on a write-once disk or an erasable optical disk | Kiyoshi Fukuchi, Yoshiyuki Otsuka | 2004-02-03 |