Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4890171 | High speed information retrieval apparatus | — | 1989-12-26 |
| 4860129 | Signal reproducing device | Nobutoshi Fukuda, Naoto Arifuku, Masashi Tanabe, Shinichi Yamamisaka, Yoshiki Furuta | 1989-08-22 |
| 4839584 | Signal level display device for recording/reproducing apparatus | Nobutoshi Fukuda, Masashi Tanabe, Yoshiki Furuta, Naoto Arifuku, Shinichi Yamamisaka | 1989-06-13 |