Issued Patents 2004
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6834035 | Digital reproduced signal processing device | Shoji Marukawa, Shinichiro Sato, Yoshimasa Oda | 2004-12-21 |
| 6741533 | Tracking error detection device | Takashige Hiratsuka, Shoji Marukawa | 2004-05-25 |