Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4571261 | Method for recovering lead from waste lead products | Martin Hedlund, Malkolm S. Lundstrom | 1986-02-18 |
| 4512798 | Method for producing lead from sulphidic and oxidic and/or sulphatic lead raw materials | Johan S. Leirnes, Malkolm S. Lundstrom, Martin Hedlund | 1985-04-23 |
| 4508565 | Method for producing lead from oxidic lead raw materials which contain sulphur | Johan S. Leirnes, Malkolm S. Lundstrom, Martin Hedlund | 1985-04-02 |