Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9157415 | System and method of controlling an electronic component of a wind turbine using contingency communications | Robert Allen Seymour, David Smith, Terry Michael Tackman, Allen Michael Ritter | 2015-10-13 |
| 6618235 | Snubber circuit | Robert Gregory Wagoner, Fred Henry Boettner, William D. Brackman, Jr. | 2003-09-09 |
| 6337804 | Multilevel PWM voltage source inverter control at low output frequencies | Eugene Filmore Kea, Fei Wang, David Smith | 2002-01-08 |
| 4763059 | Method and apparatus for induction motor drive | Paul M. Espelage | 1988-08-09 |
| 4587474 | Control for bumpless transfer of an AC motor between a solid-state inverter and a supply mains | Paul M. Espelage, David L. Lippitt | 1986-05-06 |
| 4565953 | Twelve pulse AC motor drive | Paul M. Espelage | 1986-01-21 |
| 4539514 | Start-up control for an induction motor drive | Paul M. Espelage | 1985-09-03 |