Issued Patents All Time
Showing 26–39 of 39 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6184630 | Electronic lamp ballast with voltage source power feedback to AC-side | Jinrong Qian | 2001-02-06 |
| 6153980 | LED array having an active shunt arrangement | Thomas Marshall, Michael D. Pashley, Stephen Herman | 2000-11-28 |
| 6016257 | Voltage regulated power supply utilizing phase shift control | Chin Chang, Joseph Chang | 2000-01-18 |
| 5604411 | Electronic ballast having a triac dimming filter with preconditioner offset control | Sreeraman Venkitasubrahmanian, Paul R. Veldman, Thomas Farkas, Raj Jayaraman, Yongping Xia | 1997-02-18 |
| 5559396 | Ballast filtering scheme for reduced harmonic distortion | Pawel M. Gradzki | 1996-09-24 |
| 5404082 | High frequency inverter with power-line-controlled frequency modulation | Adan F. Hernandez | 1995-04-04 |
| 5150018 | Gas discharge lamp with grid and control circuits therefor | Leo Francis Casey, Paul R. Veldman, Klaus Vegter | 1992-09-22 |
| 5068573 | Power supply with energy storage for improved voltage regulation | Paul R. Veldman | 1991-11-26 |
| 5003454 | Power supply with improved power factor correction | — | 1991-03-26 |
| 4939566 | Semiconductor switch with parallel DMOS and IGT | Barry M. Singer, Satyendranath Mukherjee | 1990-07-03 |
| 4926074 | Semiconductor switch with parallel lateral double diffused MOS transistor and lateral insulated gate transistor | Barry M. Singer, Satyendranath Mukherjee | 1990-05-15 |
| 4920474 | High frequency high voltage power supply with controlled output power | Edward H. Stupp | 1990-04-24 |
| 4882666 | High frequency high voltage power supply with controlled output power | Edward H. Stupp | 1989-11-21 |
| 4628284 | High frequency high voltage power supply preventing simultaneous transistor conduction | Mark W. Fellows | 1986-12-09 |