Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 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 |