Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7544122 | Air shutter and installation method thereof | Kouichi Tsubata, Seiichi Sakuma, Shinjirou Akaboshi, Akira Yasutome | 2009-06-09 |
| 7037189 | Air shutter and installation method thereof | Kouichi Tsubata, Seiichi Sakuma, Shinjirou Akaboshi, Akira Yasutome | 2006-05-02 |