Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4371392 | Process for refining a molten metal | Kazumasa Hasegawa, Saburo Sugiura, Kiyoichi Yamano, Shizunori Hayakawa | 1983-02-01 |
| 4308415 | Process for refining a molten metal and an apparatus therefor | Kazumasa Hasegawa, Saburo Sugiura, Kiyoichi Yamano, Shizunori Hayakawa | 1981-12-29 |