Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8679687 | Hydrogen generating method and hydrogen generating system based on the method | Ryoichi Okuyama, Yoshihiro Yamamoto, Katsuji Ashida | 2014-03-25 |
| 7939210 | Electric automobile | Ryoichi Okuyama, Yoshihiro Yamamoto, Katsuji Ashida | 2011-05-10 |
| 7910252 | Hydrogen supply system | Ryoichi Okuyama, Yoshihiro Yamamoto, Katsuji Ashida | 2011-03-22 |
| 7476456 | Submarine boat | Ryoichi Okuyama, Yoshihiro Yamamoto, Katsuji Ashida | 2009-01-13 |