Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5013355 | Method and apparatus for producing matte and/or metal | Rolf E. Malmstrom | 1991-05-07 |
| 4976776 | Method for reduction of material containing metal oxide using a fluidized bed reactor and flame chamber | Rolf E. Malmstrom | 1990-12-11 |