Issued Patents 1997
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5703441 | Multi-function filament-heater power supply for an electronic ballast for long-life dimmerable lamps | Robert Louis Steigerwald, Ljubisa Dragoljub Stevanovic | 1997-12-30 |