Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6826274 | Exchange control method | Satoshi Murata, Yuichi Sugimura, Mamoru Higuchi, Keigoro Yokota | 2004-11-30 |
| 4907256 | Exchange system having originating call restriction function | Mamoru Higuchi, Kanji Higuchi, Hiroshi Saito, Minoru Maruyama | 1990-03-06 |