Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4826139 | Stopper for a tap hole of a steel converter and method of operating a converter | — | 1989-05-02 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4826139 | Stopper for a tap hole of a steel converter and method of operating a converter | — | 1989-05-02 |