Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5210730 | Tracking error detecting apparatus for use in multibeam optical disk device | Akio Hayashi, Koichi Okabe | 1993-05-11 |
| 4866546 | Recording and reproducing apparatus for disk-type recording media | Shunichi Ohnishi, Akihiro Takagi | 1989-09-12 |
| 4809118 | PCM helical-scan magnetic record/playback systems | Katsuya Yokoyama, Hironobu Katayama | 1989-02-28 |
| 4234898 | Digital magnetic recording and reproducing apparatus | Katsuya Yokoyama, Hironobu Katayama | 1980-11-18 |