4. Electric lamp and discharge devices: systems
  5. Plural series connected load devices
  6. Christmas lights

Richtek Technology Corporation R.O.C.

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Driver circuit and driving method for electrostatic loudspeaker

Electrical audio signal processing systems and devices – Circuitry combined with specific type microphone or loudspeaker – With electrostatic loudspeaker
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LED driver using a depletion mode transistor to serve as a...

Electric lamp and discharge devices: systems – Current and/or voltage regulation
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Level shift circuit and method for the same

Electronic digital logic circuitry – Interface – Logic level shifting
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Load-dependent frequency jittering circuit and...

Electricity: power supply or regulation systems – Output level responsive – Using a three or more terminal semiconductive device as the...
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Multi-color backlight control circuit and multi-color...

Electric lamp and discharge devices: systems – Plural series connected load devices – Christmas lights
Reexamination Certificate

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