Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7840822 | Network communication system and a power feeding apparatus for a network hub | Yuzo Yamamoto, Toshio Sawahata, Hideyuki Higo, Mitsuo Ikeda | 2010-11-23 |
| 7573983 | Emergency call panel and emergency communication system | Katsuhiko Takahashi, Takahumi Hikima, Yuzo Yamamoto | 2009-08-11 |