Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11559761 | Dust collector | Yoshimasa Hayama | 2023-01-24 |
| 7966691 | Dust collector | Kumio Takahashi, Masahiro Inaniwa, Yoshimasa Hayama | 2011-06-28 |
| 7871463 | Dust collection device | Yoshimasa Hayama, Kumio Takahashi, Masahiro Inaniwa | 2011-01-18 |
| 7296323 | Dust collector | Yoshimasa Hayama, Syuichi Okada, Hidekazu Harada, Shigeru Shinohara | 2007-11-20 |