Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4884847 | Apparatus and method for mapping entry conditions in remote mining systems | Stephen L. Bessinger | 1989-12-05 |
| 4797550 | Fiber optic detector for flotation cell processing | Hayward B. Oblad | 1989-01-10 |
| 4797559 | Method and apparatus for controlling a flotation cell | Hayward B. Oblad, Thomas D. Sandbrook | 1989-01-10 |