4. Electric lamp and discharge devices: systems
  5. Pulsating or a.c. supply
  6. With power factor control device

Gyu Hyeong Cho

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Active load circuit for low-voltage CMOS voltage gain...

Amplifiers – With semiconductor amplifying device – Including differential amplifier
Reexamination Certificate

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Digital-to-analog conversion circuit and column driver...

Coded data generation or conversion – Analog to or from digital conversion – Digital to analog conversion
Reexamination Certificate

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Flat field emitter displays

Electric lamp and discharge devices – With luminescent solid or liquid material – Vacuum-type tube
Reexamination Certificate

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Power-factor correction circuit of electronic ballast for...

Electric lamp and discharge devices: systems – Pulsating or a.c. supply – With power factor control device
Reexamination Certificate

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Vacuum field transistor

Active solid-state devices (e.g. – transistors – solid-state diode – Thin active physical layer which is – Low workfunction layer for electron emission
Reexamination Certificate

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Profile ID: LFUS-PAI-P-2154367

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