Issued Patents 2002
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6346695 | Optical pickup device | Naoharu Yanagawa, Takahiro Togashi | 2002-02-12 |
| 6339581 | Disc player having a prepit detecting circuit | Masayoshi Yoshida, Yoshitaka Shimoda, Naoharu Yanagawa | 2002-01-15 |