Issued Patents 1997
Showing 1–2 of 2 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, Chester Frank Saj | 1997-12-30 |
| 5701059 | Elimination of striations in fluorescent lamps driven by high-frequency ballasts | Robert Louis Steigerwald | 1997-12-23 |