Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4824336 | Vacuum pump | Yoshiyuki Iwaki, Akio Matsumoto | 1989-04-25 |
| 4728266 | Motor drive vacuum pump | Akio Matsumoto | 1988-03-01 |
| 4560326 | Diaphragm type pump device | — | 1985-12-24 |
| 4518333 | Rotary blade pump having blades with wear resistant end surfaces | Akio Matsumoto | 1985-05-21 |