Issued Patents 1982
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4362561 | Method for the smelting of material such as ore concentrates | Horst Weigel | 1982-12-07 |
| 4358311 | Method and apparatus for the smelting of material such as ore concentrates | Horst Weigel | 1982-11-09 |