Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4867845 | Vertical steaming vessel | — | 1989-09-19 |
| 4816234 | Utilization of oxygen in leaching and/or recovery procedures employing carbon | Robert J. Brison, Phillip Mitchell | 1989-03-28 |