Issued Patents 1982
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4357674 | PCM Signal calculator | Yasushi Wakahara | 1982-11-02 |
| 4334273 | Signal processing system using a digital technique | — | 1982-06-08 |
| 4309572 | Call processing system with an operator assistance in a telephone switching system | Hiromichi Mori, Tatsuo Maruyama, Jun Matsumoto | 1982-01-05 |