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| Number | Title | Issue Date |
| 5864212 | Control system for providing power to a gas discharge lamp A dimming control circuit provides power from an ac source to a compact fluorescent lamp. The circuit generally includes a resonant half-bridge inverter driven by a pulse-duration-modulated voltage, for providing a high-frequency ac voltage between the la... | 01/26/1999 |
| 5841239 | Circuit for dimming compact fluorescent lamps A dimming control circuit provides power from an ac source to a compact fluorescent lamp. The circuit generally includes a resonant half-bridge inverter driven by a pulse-duration-modulated voltage, for providing a high-frequency ac voltage between the la... | 11/24/1998 |
| 5173643 | Circuit for dimming compact fluorescent lamps A dimming control circuit provides power from an ac source to a compact fluorescent lamp. The circuit generally includes a resonant half-bridge inverter driven by a pulse-duration-modulated voltage, for providing a high-frequency ac voltage between the la... | 12/22/1992 |
