Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5269910 | Method of coil liquefaction by hydrogenation | Tetsuo Matsumura, Osamu Okuma, Hiroshi Yoshimura, Yasuo Sugino, Shun YANAI +3 more | 1993-12-14 |
| 4565622 | Method of liquefying brown coal | Yukio Nakako, Tetsuo Matsumura, Toshio Ozawa, Shin-ichi Katsushima, Shin-ichi Oya +4 more | 1986-01-21 |