Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4816237 | Process for purifying argon gas and apparatus used therefor | Masaomi Tomomura, Kazuo Someya | 1989-03-28 |
| 4806131 | Gasification process for coal gasification furnace and apparatus therefor | Atsushi Morihara, Tomohiko Miyamoto, Shuntaro Koyama, Yukio Hishinuma | 1989-02-21 |