Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5269910 | Method of coil liquefaction by hydrogenation | Tetsuo Matsumura, Kaizaburo Saito, Osamu Okuma, Hiroshi Yoshimura, Shun YANAI +3 more | 1993-12-14 |
| 4872972 | Apparatus for classifying particles | Minoru Wakabayashi, Hiroyuki Murata, Masanobu Yamao, Takao Nishikawa | 1989-10-10 |
| 4714543 | Method of treating brown coal for liquefaction | Tetsuo Matsumura, Toshio Ohzawa, Akihiro Kawashima, Osamu Ohkuma, Saburo Sawada +2 more | 1987-12-22 |