Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8172501 | Counter-rotating axial-flow fax | Toshiya Nishizawa, Yasuhiro Maruyama | 2012-05-08 |
| D602142 | Axial fan with double impellers rotating in mutually opposite directions | Toshiya Nishizawa, Yasuhiro Maruyama | 2009-10-13 |