Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4663759 | Ring back tone transmission system | Hirotoshi Shirasu, Taihei Suzuki | 1987-05-05 |
| 4455645 | Back-up control system implemented with a redundancy scheme for protection against failure | Yoshiaki Mijioka, Kouichi Yamamoto, Taihei Suzuki | 1984-06-19 |
| 4264895 | Multi-stage switching network controlled by at least three logical inputs | Tetsuo Takeshita, Keiichi Shimizu, Ryoichi Himeno | 1981-04-28 |