Issued Patents 2016
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9382493 | Ash-free coal production method | Koji Sakai, Shigeru Kinoshita, Takuya Yoshida, Takahiro Shishido, Maki Hamaguchi | 2016-07-05 |
| 9334456 | Ash-free coal production method | Koji Sakai, Takahiro Shishido, Maki Hamaguchi | 2016-05-10 |
| 9334457 | Ash-free coal production method | Koji Sakai, Shigeru Kinoshita, Takuya Yoshida | 2016-05-10 |
| 9315751 | Gravitational settling tank and method for producing ash-free coal | Koji Sakai, Takahiro Shishido, Maki Hamaguchi | 2016-04-19 |