Issued Patents 2004
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6758881 | Metal-graphite brush and production method thereof | Takayoshi Otani, Osamu Takada, Yoichi Sakaura, Naoki Morita, Takahiro Sakamoto +5 more | 2004-07-06 |
| 6755882 | Metal-graphite brush | Takayoshi Otani, Toshio Ishikawa, Yoichi Sakaura, Naoki Morita | 2004-06-29 |
| 6700292 | Metal-graphite brush | Takayoshi Otani, Yoichi Sakaura, Takahiro Sakamoto, Youichi Murakami, Kyoji Inukai +2 more | 2004-03-02 |