Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4802976 | Method for recovering fine clean coal | — | 1989-02-07 |
| 4652363 | Dual feed hydrocyclone and method of separating aqueous slurry | — | 1987-03-24 |
| 4613430 | Froth flotation separation method and apparatus | — | 1986-09-23 |
| 4613431 | Froth flotation separation apparatus | — | 1986-09-23 |
| 4606822 | Vortex chamber aerator | — | 1986-08-19 |
| 4192551 | Remote control system for mining machines | James Collen Weimer, William S. Locks, Edwin B. Wilson | 1980-03-11 |