Issued Patents 2002
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6471498 | Fluid machinery having stepped spirals with axial pushing means for the moving spiral | Makoto Hayano | 2002-10-29 |
| 6338617 | Helical-blade fluid machine | Makoto Hayano, Akira Morishima, Masao Ozu | 2002-01-15 |