Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4812839 | System for controlling network activation sequence | Sumie Okada, Takashi Nara, Takashi Hatano, Ryoji Shimozono, Kenji Tsutsumi +2 more | 1989-03-14 |
| 4761779 | Subscriber's line switching control system | Takashi Nara, Hiroaki Takeichi, Yoshio Morita, Takashi Hatano | 1988-08-02 |
| 4754273 | System for controlling network activation sequence | Sumie Okada, Takashi Nara, Takashi Hatano, Ryoji Shimozono, Kenji Tsutsumi +2 more | 1988-06-28 |
| 4698801 | Digital exchange system | Takashi Hatano, Takashi Nara, Sumie Okada | 1987-10-06 |