Issued Patents All Time
Showing 1–25 of 58 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9723671 | AC-powered LED light engine | — | 2017-08-01 |
| 9585212 | AC-powered LED light engine | — | 2017-02-28 |
| 9491821 | AC-powered LED light engine | — | 2016-11-08 |
| 9167641 | Phase controlled dimming LED driver system and method thereof | Zhanqi Du | 2015-10-20 |
| 8994293 | Single phase bridgeless boost converter for LED lighting applications | Denny D. Beasley | 2015-03-31 |
| 8736189 | Electronic ballasts with high-frequency-current blocking component or positive current feedback | Zhanqi Du | 2014-05-27 |
| 8203276 | Phase controlled dimming LED driver system and method thereof | Zhanqi Du | 2012-06-19 |
| 8018173 | Ballasts for fluorescent lamps | Zhiqing Wu | 2011-09-13 |
| 7432660 | IC-based low cost reliable electronic ballast with multiple striking attempts and end of lamp life protection | David Anthony Blair, Ruhe Shi | 2008-10-07 |
| 7423386 | Power supply circuits and methods for supplying stable power to control circuitry in an electronic ballast | Christopher Radzinski, Qinghong Yu | 2008-09-09 |
| 7132803 | High efficiency 4-lamp instant start ballast | John J. Dernovsek, Barrie Drew, Qinghong Yu | 2006-11-07 |
| 7098608 | Lossless circuit for sampling of lamp voltage | Qinghong Yu, Christopher Radzinkski, John J. Dernovsek | 2006-08-29 |
| 7098606 | Electronic ballast with open circuit voltage control and cable compensation | Qinghong Yu, Christopher Radzinski, John J. Dernovsek | 2006-08-29 |
| 7098607 | Electronic ballast with lossless snubber capacitor circuit | Qinghong Yu, Christopher Radzinski, John J. Dernovsek | 2006-08-29 |
| 7019662 | LED drive for generating constant light output | — | 2006-03-28 |
| 6791275 | Low pressure gas discharge lamp ballast with on-off indicator | — | 2004-09-14 |
| 6437520 | Electronic ballast with cross-coupled outputs | Gueorgui L. Grouev | 2002-08-20 |
| 6420838 | Fluorescent lamp ballast with integrated circuit | — | 2002-07-16 |
| 6177769 | Electric Ballast with selective power dissipation | Ronald J. Bezdon, Ming Liang Wu, Donald Huvaere | 2001-01-23 |
| 6137239 | Electronic ballast with selective load control | Ming Liang Wu, Donald Huvaere | 2000-10-24 |
| 6111365 | Fast starting, surge limited, electronic ballast | Grigoriy Mirskiy, Michael W. Bandel, Kent E. Crouse | 2000-08-29 |
| 6023132 | Electronic ballast deriving auxilliary power from lamp output | Kent E. Crouse, Patrick J. Keegan, Ronald J. Bezdon | 2000-02-08 |
| 5982113 | Electronic ballast producing voltage having trapezoidal envelope for instant start lamps | Kent E. Crouse, Patrick J. Keegan, Ronald J. Bezdon | 1999-11-09 |
| 5973455 | Electronic ballast with filament cut-out | Grigoriy Mirskiy, William L. Keith, Kent E. Crouse, Patrick J. Keegan, Ronald J. Bezdon | 1999-10-26 |
| 5925990 | Microprocessor controlled electronic ballast | Kent E. Crouse, Ronald J. Bezdon, Michael W. Bandel, Patrick J. Keegan, Boyko Boykov +1 more | 1999-07-20 |