Issued Patents All Time
Showing 1–15 of 15 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6487282 | Apparatus and method for an inbound telemetry device to sense telephone line status | Joshua Zhu | 2002-11-26 |
| 6445142 | Apparatus and method for remotely detecting a magnetic ballast | Yin Zhang | 2002-09-03 |
| 6347135 | Apparatus and method for powering a telephone-based inbound telemetry device | Joshua Zhu | 2002-02-12 |
| 5872429 | Coded communication system and method for controlling an electric lamp | Sreeraman Venkitasubrahmanian, Raj Jayaraman, Thomas Farkas | 1999-02-16 |
| 5834906 | Instant start for an electronic ballast preconditioner having an active power factor controller | John Chou, Feng Hu | 1998-11-10 |
| 5808422 | Lamp ballast with lamp rectification detection circuitry | Sreeraman Venkitasubrahmanian, Clint Mason, Feng-Kang Hu, Jaap Schlejen | 1998-09-15 |
| 5808423 | Lighting control for reducing energy consumption | Richard Qun Li, John Chou, Ronald Siepkes | 1998-09-15 |
| 5751115 | Lamp controller with lamp status detection and safety circuitry | Raj Jayaraman, Sreeraman Venkitasubrahmanian, Paul Leyton | 1998-05-12 |
| 5739645 | Electronic ballast with lamp flash protection circuit | Xing-Xing Lu, John Chou | 1998-04-14 |
| 5726644 | Lighting control system with packet hopping communication | Thomas E. Jednacz, Srinagesh Satyanarayana | 1998-03-10 |
| 5691605 | Electronic ballast with interface circuitry for multiple dimming inputs | Joshua Zhu, Sreeraman Venkitasubrahmanian, Raj Jayaraman, Thomas Farkas | 1997-11-25 |
| 5650694 | Lamp controller with lamp status detection and safety circuitry | Raj Jayaraman, 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, Raj Jayaraman | 1997-02-18 |
| 5559395 | Electronic ballast with interface circuitry for phase angle dimming control | Sreeraman Venkitasubrahmanian, Thomas Farkas, Raj Jayaraman | 1996-09-24 |
| 5489827 | Light controller with occupancy sensor | — | 1996-02-06 |