Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4864608 | Echo suppressor | Sumie Nakabayashi, Yoshiro Suzuki, Kazuhiro Kondo, Shinichi Niina | 1989-09-05 |
| 4841521 | Method and system for bidirectionally transmitting data | Eiichi Amada, Hirotoshi Shirasu, Hiroshi Takatori, Tohru Kazawa, Toshiro Suzuki +1 more | 1989-06-20 |
| 4809271 | Voice and data multiplexer system | Kazuhiro Kondo, Toshiro Suzuki | 1989-02-28 |