Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4864608 | Echo suppressor | Takanori Miyamoto, Sumie Nakabayashi, Yoshiro Suzuki, Shinichi Niina | 1989-09-05 |
| 4809271 | Voice and data multiplexer system | Toshiro Suzuki, Takanori Miyamoto | 1989-02-28 |