Issued Patents 1997
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5647888 | Process for producing metals and metal alloys in a smelt reduction vessel | John Keogh, Barry S. Andrews | 1997-07-15 |
| 5640708 | Treatment of waste | David Stewart Conochie, Terry Matthews | 1997-06-17 |