Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5040959 | Roots blower with improved clearance between rotors | — | 1991-08-20 |
| 4975032 | Roots type blower having reduced gap between rotors for increasing efficiency | Kiyoshi Arai, Yutaka Ohtsuka | 1990-12-04 |