Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4478394 | Apparatus for the separation of lead from a sulfidic concentrate | Olavi A. Aaltonen, Rolf E. Malmstrom, Esko O. Nermes | 1984-10-23 |
| 4391632 | Process for the separation of lead from a sulfidic concentrate | Olavi A. Aaltonen, Rolf E. Malmstrom, Esko O. Nermes | 1983-07-05 |