Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4536214 | Metal sulphide extraction | Leonard R. Ochs, Archibald W. Fletcher, Harald Weber | 1985-08-20 |
| 4502952 | Control device | David G. Webster, Gordon Willey | 1985-03-05 |
| 4378275 | Metal sulphide extraction | David V. Adamson | 1983-03-29 |