Issued Patents 1997
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5602910 | Control apparatus for switching station connections using a holding tone | Minoru Ogata, Shoji Suzuki, Shinji Tsuchida, Shunji Arai, Shigeru Hiroki | 1997-02-11 |
| 5594944 | Communication channel selection method | Minoru Ogata, Shoji Suzuki, Shinji Tsuchida, Shunji Arai, Shigeru Hiroki | 1997-01-14 |