Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7948721 | AC motor bypass with fault annunciation, serial communication and fault tolerant coil control | Jeffrey A. Brunner, Kalyan P. Gokhale, Douglas Karraker, Donald J. Truettner | 2011-05-24 |
| 7154277 | Method and apparatus for detecting faults in AC to AC, or DC to AC power conversion equipments when the equipment is in a high impedance mode | Alpo Vallinmaki, Douglas Karraker | 2006-12-26 |