Issued Patents 2003
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6603726 | Pre-pit detection unit | Masayoshi Yoshida | 2003-08-05 |
| 6577565 | Optical pickup for performing recording or reading operation on recording medium having prepits | Naoharu Yanagawa, Masayoshi Yoshida | 2003-06-10 |