Issued Patents 2004
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6765860 | Optical disc and optical drive | Shigemi Maeda, Toshiaki Hioki, Michio Matsuura | 2004-07-20 |
| 6751166 | Phase error detection method for magnetic wall displacement type of magneto-optical recording device | Goro Fujita, Tetsuhiro Sakamoto | 2004-06-15 |
| 6678223 | Frequency demodulating circuit, optical disk apparatus thereof and preformating device | Susumu Tosaka, Yoshikatsu Niwa, Shinichi Nakao, Goro Fujita | 2004-01-13 |