Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4714543 | Method of treating brown coal for liquefaction | Tetsuo Matsumura, Akihiro Kawashima, Osamu Ohkuma, Saburo Sawada, Shun'ichi Yanai +2 more | 1987-12-22 |
| 4314898 | Process for reforming coal | Yukio Nakako, Shizuo Yokota, Masaaki Tamura | 1982-02-09 |
| 4185395 | Method for thermal dehydration of brown coal | Yukio Nakako, Kenjiro Motonaga, Junichiro Nada, Shizuo Yokota, Haruo Kakunai | 1980-01-29 |