Issued Patents All Time
Showing 1–18 of 18 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9407134 | Systems and methods for limiting current inrush in electric drive systems | Amin A. Moghadas, Renato L. Pichilingue, Patrick B. Cochran | 2016-08-02 |
| 8334666 | Device, computer program product and computer-implemented method for backspin detection in an electrical submersible pump assembly | Sheldon Plitt | 2012-12-18 |
| 8314583 | System, method and program product for cable loss compensation in an electrical submersible pump system | Tom G. Yohanan, Dick L. Knox, Jim E. Layton, Howard G. Thompson | 2012-11-20 |
| 8141646 | Device and method for gas lock detection in an electrical submersible pump assembly | Robert Allen, Dick L. Knox, Jerald R. Rider, Tom G. Yohanan, Brown Lyle Wilson +1 more | 2012-03-27 |
| 8125177 | System and method for adding voltages of power modules in variable frequency drives | Jerald R. Rider, Jim E. Layton, Dick L. Knox | 2012-02-28 |
| 8092190 | Systems and methods for reducing pump downtime by determining rotation speed using a variable speed drive | Sheldon Plitt, Jerald R. Rider, Tom G. Yohanan | 2012-01-10 |
| 7834643 | Systems and methods for reducing distortion in a power source using an active harmonics filter | Tom G. Yohanan, Jerald R. Rider, Michael C. Underwood | 2010-11-16 |
| 7798215 | Device, method and program product to automatically detect and break gas locks in an ESP | Brown Lyle Wilson, Jerald R. Rider, Bryan D. Schulze | 2010-09-21 |
| 7607896 | Systems and methods for power ride-through in variable speed drives | Dick L. Knox, Tom G. Yohanan, Jerald R. Rider | 2009-10-27 |
| 7040391 | Low harmonic diode clamped converter/inverter | Fang Peng | 2006-05-09 |
| 6586900 | Method for boosting the output voltage of a variable frequency drive | Jerald R. Rider, James E. Layton, Dick L. Knox | 2003-07-01 |
| 6043995 | Method and apparatus for pulse width modulation of a power supply for increased transient stability in subsurface wellbore pumps | — | 2000-03-28 |
| 5220494 | Protection circuit and method for variable speed drives utilizing phase controlled converters | — | 1993-06-15 |
| 4680664 | Overcurrent protection circuit for power transistors | — | 1987-07-14 |
| 4598353 | Thyristor firing circuit for determining phase angle | — | 1986-07-01 |
| 4542324 | Overtemperature speed control for a variable speed drive | — | 1985-09-17 |
| 4491778 | Motor variable frequency drive | Dick L. Knox, Kevin W. Lockyear | 1985-01-01 |
| 4467258 | Power factor correction for variable speed drive | — | 1984-08-21 |