Issued Patents All Time
Showing 26–37 of 37 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8581497 | Electronic ballast circuit and method for detecting removal of parallel connected lamp filaments in low level dimming | Wei Xiong, Candice Ungacta, Danny Pugh | 2013-11-12 |
| 8536801 | System and method for individually modulating an array of light emitting devices | — | 2013-09-17 |
| 8405488 | System and method for encoding ballast control signals | Henry W. Jacobs, James Koehler | 2013-03-26 |
| 7800928 | Method of operating a resonant inverter using zero current switching and arbitrary frequency pulse width modulation | Steve Mays | 2010-09-21 |
| 7394204 | Zero crossing detection of line voltage/current of variable amplitude | Deepak Shivaram Shet, Changsheng Li | 2008-07-01 |
| 7391168 | Digital control of electronic ballasts using AC power lines as a communication medium | Deepak Shivaram Shet, Brett Bell | 2008-06-24 |
| 7239094 | Electronic ballast with adaptive lamp preheat and ignition | Christopher Radzinski, Qinghong Yu | 2007-07-03 |
| 7132803 | High efficiency 4-lamp instant start ballast | Peter W. Shackle, Barrie Drew, Qinghong Yu | 2006-11-07 |
| 7098606 | Electronic ballast with open circuit voltage control and cable compensation | Qinghong Yu, Christopher Radzinski, Peter W. Shackle | 2006-08-29 |
| 7098607 | Electronic ballast with lossless snubber capacitor circuit | Qinghong Yu, Christopher Radzinski, Peter W. Shackle | 2006-08-29 |
| 7098608 | Lossless circuit for sampling of lamp voltage | Qinghong Yu, Christopher Radzinkski, Peter W. Shackle | 2006-08-29 |
| 4922525 | Paystation theft inhibiting circuit | — | 1990-05-01 |