Issued Patents All Time
Showing 1–11 of 11 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10131858 | Method for manufacturing ashless coal | Koji Sakai, Takuya Yoshida, Shigeru Kinoshita | 2018-11-20 |
| 10035967 | Method for producing ash-free coal | Takuya Yoshida, Shigeru Kinoshita, Koji Sakai | 2018-07-31 |
| 9938477 | Ashless-coal production device, and ashless-coal production method | Koji Sakai, Takuya Yoshida, Shigeru Kinoshita, Maki Hamaguchi | 2018-04-10 |
| 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 |
| 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 |
| 8790420 | Method for producing reduced metal and slag containing oxidized nonferrous metal using an upgraded coal | Takao Harada, Hidetoshi Tanaka, Isao Kobayashi, Takuo Shigehisa | 2014-07-29 |
| 7799100 | Method for producing improved coal for use in metallurgy, and method for producing reduced metal and slag containing oxidized nonferrous metal | Takao Harada, Hidetoshi Tanaka, Isao Kobayashi, Takuo Shigehisa | 2010-09-21 |