Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5028388 | Method for producing chromium containing molten iron with low sulphur concentration | Chikashi Tada, Sumio Yamada, Hajime Bada | 1991-07-02 |
| 4919713 | Process for producing chromium containing molten iron | Sumio Yamada, Chikashi Tada, Hajime Bada | 1990-04-24 |