Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4566579 | Multiple biscuit clutch or brake with circulated immersion cooling | — | 1986-01-28 |
| 4335808 | Multiple biscuit clutch or brake | — | 1982-06-22 |
| 4226311 | Rotary drive disc brake for drawworks | Lesley G. Watkins | 1980-10-07 |
| 4203575 | Hydraulic elevating ramp | — | 1980-05-20 |