Issued Patents 1989
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4879005 | Electrochemical sensor for hydrogen sensing | David R. Morris | 1989-11-07 |
| 4869790 | Metal separation process | James Charles, Piers M. Copham | 1989-09-26 |
| 4857156 | Separating a ferro alloy | Alan J. Godsell | 1989-08-15 |
| 4800069 | Zinc recovery from furnace dust | — | 1989-01-24 |