Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4976571 | Anchor device for securing rock bolts | Dennis Mraz | 1990-12-11 |
| 4484643 | Gas-liquid-solids separation system | Carel J. H. Brest van Kempen, Robert M. Sweet, Amber C. Davidson | 1984-11-27 |
| 4480842 | Self-aligning stuffing box | Robert M. Sweet, Carel J. H. Brest van Kempen | 1984-11-06 |
| 4325437 | Anvil with trapped fluid | William S. Swindall | 1982-04-20 |
| 4240664 | Hydraulic jet cutting tool and method | John Duff | 1980-12-23 |