Issued Patents All Time
Showing 1–8 of 8 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5066384 | Process for refining coal-derived heavy carbonaceous materials | Tohru Iwahashi, Katsumi Satoh, Katsuyuki Ohshima, Kenichi Iwaguro | 1991-11-19 |
| 4874564 | Molding process and device therefor | Kiyoshi Sudani | 1989-10-17 |
| 4671907 | Method of manufacturing carbon materials | Tohru Iwahashi, Tadashi Miyamura | 1987-06-09 |
| 4437974 | Coal liquefaction process | Ryohei Minami, Shozo Okamura, Takuji Hosoi, Takuo Kanou | 1984-03-20 |
| 4402824 | Process for refining coal-based heavy oils | Keiichi Sasaki, Tohru Iwahashi | 1983-09-06 |
| 4326946 | Process for manufacture of solvent for coal liquefaction | Tsukasa Chikata, Keiichi Sasaki, Kunihiko Nishioka | 1982-04-27 |
| 4303498 | Process for manufacture of solvent for coal liquefaction | Tsukasa Chikata, Keiichi Sasaki, Kunihiko Nishioka | 1981-12-01 |
| 4272324 | Process for producing shaft furnace cokes | Kunihiko Nishioka | 1981-06-09 |