Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4748659 | Calling signal transmission apparatus | Kiyoshi Kasahara, Kenichi Ogawa, Kenji Takato, Yoshimi Iijima, Yasuo Miyazaki +3 more | 1988-05-31 |
| 4656625 | Switching system having capability for telecommunication conferences | Kenichi Ogawa, Koso Murakami | 1987-04-07 |
| 4512015 | Digital time-division switch | Yoshiharu Kano, Makoto Fujisawa, Yoshikazu Tanaka | 1985-04-16 |