Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5025441 | Key telephone system | Hironobu Oshikata, Yoshihiro Kawata, Nobuyasu Shiga, Hideharu Omori, Masayuki Kawashima +1 more | 1991-06-18 |
| 4905258 | Data circuit-terminating equipment | Toshimichi Shimatani, Yoshihiro Kawata | 1990-02-27 |
| 4775840 | Noise removing circuit | Hideharu Ohmori | 1988-10-04 |
| 4726016 | Conference system | Seiya Uchida, Koichi Sekiguchi | 1988-02-16 |
| 4658397 | Time division multiplex data transfer system and method for telephone switching or like applications | Masataka Kawamura | 1987-04-14 |