Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4670139 | Drilling mud cleaning machine | Jerry L. Spruiell | 1987-06-02 |
| 4431535 | Centrifugal separator system | — | 1984-02-14 |
| 4269566 | Centrifugal pump for abrasive liquids | — | 1981-05-26 |