Issued Patents 2017
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9752088 | Ashless coal production method | Koji Sakai, Shigeru Kinoshita, Takuya Yoshida | 2017-09-05 |
| 9714394 | Method for producing ashless coal | Shigeru Kinoshita, Takuya Yoshida, Koji Sakai | 2017-07-25 |