Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6301343 | Trunk line exchange system | — | 2001-10-09 |
| 5726767 | Automatic facsimile signal analyzing apparatus for a telephone exchange system | Takashi Itani, Ken Nishimura, Hideki Amano, Masayoshi Sato | 1998-03-10 |
| 4677252 | Circuit board | Satoshi Takahashi, Akira Tsutsumi, Junji Suzuki, Takao Ito, Kenji Ohsawa +4 more | 1987-06-30 |