Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4935957 | Key telephone system | Kuniaki Shimoseki, Tetsuya Hiraji, Yoshiji Tanimoto, Minoru Okumura | 1990-06-19 |
| 4831516 | Data transmission system between a main CPU board having a wait signal generating latch and a plurality of CPU boards | Minoru Shigematsu, Yoshiji Tanimoto, Minoru Okumura | 1989-05-16 |
| 4660219 | Extension ringing arrangement key telephone system | Toru Tagawa, Yoshiji Tanimoto, Minoru Okumura | 1987-04-21 |