Issued Patents All Time
Showing 26–29 of 29 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7423386 | Power supply circuits and methods for supplying stable power to control circuitry in an electronic ballast | Peter W. Shackle, Qinghong Yu | 2008-09-09 |
| 7239094 | Electronic ballast with adaptive lamp preheat and ignition | John J. Dernovsek, Qinghong Yu | 2007-07-03 |
| 7098606 | Electronic ballast with open circuit voltage control and cable compensation | Qinghong Yu, Peter W. Shackle, John J. Dernovsek | 2006-08-29 |
| 7098607 | Electronic ballast with lossless snubber capacitor circuit | Qinghong Yu, John J. Dernovsek, Peter W. Shackle | 2006-08-29 |