Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7810623 | Centrifugal friction clutch with improved thermal management | — | 2010-10-12 |
| 4935685 | Motor controller for pumping units | David Watts, Ernest D. Showalter | 1990-06-19 |