Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4824479 | Method for producing a carbonaceous solid reductant for direct reduction of iron ore | Toshio Matsuoka, Seiji Sugimori, Yukio Koyabu | 1989-04-25 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4824479 | Method for producing a carbonaceous solid reductant for direct reduction of iron ore | Toshio Matsuoka, Seiji Sugimori, Yukio Koyabu | 1989-04-25 |