Issued Patents All Time
Showing 1–14 of 14 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7906917 | Startup flicker suppression in a dimmable LED power supply | Ajay Tripathi, Ningliang Mi, Rama Venkat, Srinivasa Baddela | 2011-03-15 |
| 5998930 | Electronic ballast with two-step boost converter and method | Bhadresh Mehta, John G. Konopka | 1999-12-07 |
| 5969483 | Inverter control method for electronic ballasts | Edward Li, Guang Liu, Dennis L. Stephens | 1999-10-19 |
| 5945788 | Electronic ballast with inverter control circuit | Edward Li, Guang Liu, Dennis L. Stephens | 1999-08-31 |
| 5834924 | In-rush current reduction circuit for boost converters and electronic ballasts | John G. Konopka, Kenneth D. Labudda, Dennis L. Stephens | 1998-11-10 |
| 5729096 | Inverter protection method and protection circuit for fluorescent lamp preheat ballasts | Guang Liu | 1998-03-17 |
| 5315280 | Bobbin for electrical windings | Rembert R. Stokes | 1994-05-24 |
| 5313176 | Integrated common mode and differential mode inductor device | — | 1994-05-17 |
| 4992919 | Parallel resonant converter with zero voltage switching | Chu-Quon Lee, Kasemsan Siri | 1991-02-12 |
| 4717994 | Current mode control for DC converters operating over 50% duty cycle | Bonifacio Diaz | 1988-01-05 |
| 4694236 | Control for AC motor drive | Lawrence W. Messenger | 1987-09-15 |
| 4633381 | Inverter shoot-through protection circuit | — | 1986-12-30 |
| 4633382 | Inverter control system | Lawrence W. Messenger | 1986-12-30 |
| 4616142 | Method of operating parallel-connected semiconductor switch elements | W. William Wold, Pierre Thollot | 1986-10-07 |