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Automatic frequency control for local oscillator used with an AM

Electrical audio signal processing systems and devices – Binaural and stereophonic – Broadcast or multiplex stereo
Patent

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Automatic IF tangent lock control circuit

Electrical audio signal processing systems and devices – Binaural and stereophonic – Broadcast or multiplex stereo
Patent

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Automatic LFE audio signal derivation system

Electrical audio signal processing systems and devices – Binaural and stereophonic – Pseudo stereophonic
Reexamination Certificate

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Automatic mode detection in digital audio receivers

Electrical audio signal processing systems and devices – Binaural and stereophonic – Broadcast or multiplex stereo
Patent

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Automatic multi-system AM stereo receiver using existing single-

Electrical audio signal processing systems and devices – Binaural and stereophonic – Broadcast or multiplex stereo
Patent

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Automatic stereophonic manipulation system and apparatus for ima

Electrical audio signal processing systems and devices – Binaural and stereophonic
Patent

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Automatic stereophonic manipulation system and apparatus for ima

Electrical audio signal processing systems and devices – Binaural and stereophonic
Patent

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Automatic telephone switch for hearing aid

Electrical audio signal processing systems and devices – Binaural and stereophonic
Reexamination Certificate

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Automobile audiovisual system

Electrical audio signal processing systems and devices – Binaural and stereophonic – Stereo speaker arrangement
Reexamination Certificate

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Automotive audio reproducing apparatus

Electrical audio signal processing systems and devices – Binaural and stereophonic – Stereo speaker arrangement
Reexamination Certificate

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Automotive surround sound circuit background of the invention

Electrical audio signal processing systems and devices – Binaural and stereophonic – Pseudo stereophonic
Patent

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