Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5909098 | Downhole pumping system with variable speed pulse-width modulated inverter coupled to electrical motor via non-gap transformer | Karl Konecny, Allan B. Plunkett, Kelly Ray Packard | 1999-06-01 |
| 5844397 | Downhole pumping system with variable speed pulse width modulated inverter coupled to electrical motor via non-gap transformer | Karl Konecny, Allan B. Plunkett, Kelly Ray Packard | 1998-12-01 |