Issued Patents All Time
Showing 26–43 of 43 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6320329 | Modular high frequency ballast architecture | — | 2001-11-20 |
| 6300723 | Apparatus for power factor control | Shenghong Wang, Demetri Giannopoulos | 2001-10-09 |
| 6157093 | Modular master-slave power supply controller | Demetri Giannopoulos | 2000-12-05 |
| 6140777 | Preconditioner having a digital power factor controller | Shenghong Wang, Demetri Giannopoulos | 2000-10-31 |
| 6100647 | Lamp ballast for accurate control of lamp intensity | Demetri Giannopoulos, Sreeraman Venkitasubrahmanian | 2000-08-08 |
| 6084361 | Discharge lamp operating circuit with on time control of switching transistor | — | 2000-07-04 |
| 6020689 | Anti-flicker scheme for a fluorescent lamp ballast driver | Pawel M. Gradzki | 2000-02-01 |
| 6011360 | High efficiency dimmable cold cathode fluorescent lamp ballast | Pawel M. Gradzki, Wen-Jian Gu | 2000-01-04 |
| 5973437 | Scheme for sensing ballast lamp current | Pawel M. Gradzki | 1999-10-26 |
| 5798620 | Fluorescent lamp dimming | Vinit Jayaraj, Eugen Jacob De Mol | 1998-08-25 |
| 5742134 | Inverter driving scheme | Demetri Giannopoulos | 1998-04-21 |
| 5680017 | Driving scheme for minimizing ignition flash | Paul R. Veldman, Demetri Giannopoulos | 1997-10-21 |
| 4639897 | Priority encoded spare element decoder | — | 1987-01-27 |
| 4567387 | Linear sense amplifier | — | 1986-01-28 |
| 4472805 | Memory system with error storage | Andrew G. F. Dingwall, Roger G. Stewart | 1984-09-18 |
| 4450562 | Two level parity error correction system | Roger G. Stewart | 1984-05-22 |
| 4437024 | Actively controlled input buffer | — | 1984-03-13 |
| 4386284 | Pulse generating circuit using current source | Roger G. Stewart | 1983-05-31 |