4. Amplifiers
  5. With plural diverse-type amplifying devices

Brent K. Butler

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Direct box employing hybrid vacuum tube and solid state circuitr

Amplifiers – With plural diverse-type amplifying devices
Patent

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Hybrid audio amplifier

Amplifiers – With plural diverse-type amplifying devices
Reexamination Certificate

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Hybrid solid state/vacuum tube audio amplifier

Amplifiers – With plural diverse-type amplifying devices
Patent

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Tube overdrive pedal operable using low voltage DC battery elimi

Music – Instruments – Electrical musical tone generation
Patent

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Tube sound solid-state amplifier

Amplifiers – With semiconductor amplifying device – Including differential amplifier
Patent

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Profile ID: LFUS-PAI-P-80175

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