Issued Patents All Time
Showing 26–27 of 27 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5001744 | Communication system having a first and second communication procedures | Tsutomu Nishino, Osamu Hirata, Shoji Suzuki, Masaki Hara, Minoru Ogata | 1991-03-19 |
| 4958369 | Key telephone system accommodating both digital and analog telephone networks | — | 1990-09-18 |