Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7609683 | Communication system, connection management server apparatus, and recording medium on which program is recorded | Masayuki Yamada, Kazuhiko Azuma, Toshikazu Maruyama | 2009-10-27 |
| 7366146 | Data communication system and method and server | Masayuki Yamada, Kazuhiro Azuma, Toshikazu Maruyama | 2008-04-29 |