Issued Patents 2004
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6719458 | Ball bearing | Takayuki Yatabe, Hisato Yamamoto, Yasuhisa Terada, Takashi Ogawa, Tsuyoshi Koshi +1 more | 2004-04-13 |
| 6691551 | Traction coefficient measurement device | Ryoichi Otaki, Shinichi Natsumeda | 2004-02-17 |