Issued Patents All Time
Showing 25 most recent of 28 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8487541 | Method to ensure ballast starting regardless of half cycle input | Bruce Richard Roberts | 2013-07-16 |
| 8487551 | Ultra-high efficiency ballast with end of lamp life protection | James K. Skully | 2013-07-16 |
| 7948191 | Parallel transformer with output side electrical decoupling | James K. Skully, Haiyan Wang | 2011-05-24 |
| 7944155 | LED driver with single inverter circuit with isolated multi-channel outputs | James K. Skully | 2011-05-17 |
| 7923941 | Low cost compact size single stage high power factor circuit for discharge lamps | Virgil A. Chichernea, James K. Skully | 2011-04-12 |
| 7830096 | Circuit with improved efficiency and crest factor for current fed bipolar junction transistor (BJT) based electronic ballast | Nitin Kumar, James K. Skully | 2010-11-09 |
| 7759880 | Combined ballast for fluorescent lamp and light emitting diode and method of driving same | Istvan Maros, Istvan Bakk, Louis R. Nerone, Nitin Kumar | 2010-07-20 |
| 7733028 | Method and system for eliminating DC bias on electrolytic capacitors and shutdown detecting circuit for current fed ballast | Hailiang Miao, Nitin Kumar | 2010-06-08 |
| 7601960 | Control for UV water disinfection | Andy Albrecht, Larry Fish, Sam DuPlessis | 2009-10-13 |
| 7420336 | Method of controlling cathode voltage with low lamp's arc current | Wei Xiong, Bruce Richard Roberts | 2008-09-02 |
| 7382099 | Striation control for current fed electronic ballast | Timothy B. Gurin, James D. Mieskoski, James K. Skully | 2008-06-03 |
| 7327101 | Single point sensing for end of lamp life, anti-arcing, and no-load protection for electronic ballast | Ajay Karthik Hari, Gregory Alan Harper | 2008-02-05 |
| 7315130 | Switching control for inverter startup and shutdown | James K. Skully | 2008-01-01 |
| 7247991 | Dimming ballast and method | Didier Gilbert Rouaud, James K. Skully | 2007-07-24 |
| 7193368 | Parallel lamps with instant program start electronic ballast | James K. Skully | 2007-03-20 |
| 7075251 | Universal platform for phase dimming discharge lighting ballast and lamp | James K. Skully | 2006-07-11 |
| 6989637 | Method and apparatus for a voltage controlled start-up circuit for an electronic ballast | James D. Mieskoski, Virgil A. Chichernea | 2006-01-24 |
| 6936970 | Method and apparatus for a unidirectional switching, current limited cutoff circuit for an electronic ballast | James D. Mieskoski, Didier Gilbert Rouaud, Scott Michael Brandonisio | 2005-08-30 |
| 6841951 | Single stage HID electronic ballast | James K. Skully | 2005-01-11 |
| 6831423 | High Q impedance matching inverter circuit with automatic line regulation | — | 2004-12-14 |
| 6677718 | HID electronic ballast with glow to arc and warm-up control | James K. Skully | 2004-01-13 |
| 6653800 | Ballast circuit with lamp cathode protection and ballast protection | — | 2003-11-25 |
| 6459214 | High frequency/high power factor inverter circuit with combination cathode heating | Melvin Cosby, James K. Skully | 2002-10-01 |
| 6417631 | Integrated bridge inverter circuit for discharge lighting | Louis R. Nerone, James K. Skully | 2002-07-09 |
| 6411524 | Dual planar printed wiring board for compact fluorescent lamp | James K. Skully | 2002-06-25 |