Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4887798 | Device for detecting slag flowing with molten metal through an outlet opening in a metallurgical vessel | — | 1989-12-19 |
| 4816758 | Method and apparatus for the detection of slag co-flowing within a stream of molten metal | Wolfgang Theissen, Franz-Rudolf Block | 1989-03-28 |