Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7635959 | VSD control | Steven J. Holden, Vishnu M. Sishtla | 2009-12-22 |
| 6874329 | Refrigerant cooled variable frequency drive and method for using same | Michael A. Stark | 2005-04-05 |
| 6688124 | Electronic expansion valve control for a refrigerant cooled variable frequency drive (VFD) | Michael A. Stark | 2004-02-10 |
| 5685699 | Compressor transmission vent system | Vishnu M. Sishtla, Jarso Mulugeta | 1997-11-11 |