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Electric signal processing of electroacoustic transducer

Electrical audio signal processing systems and devices – Including frequency control
Reexamination Certificate

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Electroacoustic apparatus having ringing signal generation...

Electrical audio signal processing systems and devices – Including frequency control – Automatic tone control
Reexamination Certificate

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Electroacoustic network

Electrical audio signal processing systems and devices – Including frequency control
Patent

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Electronic audio accurate reproduction system and method

Electrical audio signal processing systems and devices – Including frequency control
Patent

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Electronic audio signal amplifier and loudspeaker system

Electrical audio signal processing systems and devices – Including frequency control – Having crossover filter
Patent

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Equalizer and audio device using the same

Electrical audio signal processing systems and devices – Including frequency control – Having automatic equalizer circuit
Patent

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Equalizer and audio device using the same

Electrical audio signal processing systems and devices – Including frequency control – Automatic tone control
Patent

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Equalizer and audio device using the same

Electrical audio signal processing systems and devices – Including frequency control – Automatic tone control
Patent

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Equalizer apparatus having two dimensional display

Electrical audio signal processing systems and devices – Including frequency control – Having automatic equalizer circuit
Patent

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Equalizer networks and methods of developing scaling coefficient

Electrical audio signal processing systems and devices – Including frequency control – Having automatic equalizer circuit
Patent

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Equalizer with adjustable band filters and a digital filter suit

Electrical audio signal processing systems and devices – Including frequency control
Patent

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Equalizing circuit amplifying bass range signal

Electrical audio signal processing systems and devices – Including frequency control – Having automatic equalizer circuit
Reexamination Certificate

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Equalizing circuit for a loudspeaker system

Electrical audio signal processing systems and devices – Including frequency control – Having automatic equalizer circuit
Patent

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