Issued Patents 2011
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7966691 | Dust collector | Kumio Takahashi, Yoshimasa Hayama, Daisuke Kakegawa | 2011-06-28 |
| 7871463 | Dust collection device | Yoshimasa Hayama, Daisuke Kakegawa, Kumio Takahashi | 2011-01-18 |