Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4832925 | Recovery of zinc from zinc-containing sulphidic material | Donald R. Weir, Ian M. Masters | 1989-05-23 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4832925 | Recovery of zinc from zinc-containing sulphidic material | Donald R. Weir, Ian M. Masters | 1989-05-23 |