Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4613365 | Method for recovering precious metals | Hans Berg, Leif Johansson | 1986-09-23 |
| 4612171 | Method for recovering metal values from materials containing copper and/or precious metals | — | 1986-09-16 |
| 4608083 | Method for recovering the valuable metal content of contaminated copper raw material | Leif Johansson | 1986-08-26 |