Issued Patents 1997
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5691605 | Electronic ballast with interface circuitry for multiple dimming inputs | Yongping Xia, Joshua Zhu, Sreeraman Venkitasubrahmanian, Thomas Farkas | 1997-11-25 |
| 5650694 | Lamp controller with lamp status detection and safety circuitry | Yongping Xia, Sreeraman Venkitasubrahmanian, Paul Leyten | 1997-07-22 |
| 5604411 | Electronic ballast having a triac dimming filter with preconditioner offset control | Sreeraman Venkitasubrahmanian, Gert W. Bruning, Paul R. Veldman, Thomas Farkas, Yongping Xia | 1997-02-18 |