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Structure around a speaker unit and applied electric or...

Electrical audio signal processing systems and devices – Having non-electrical feature – And loudspeaker
Reexamination Certificate

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Surround sound loudspeakers

Electrical audio signal processing systems and devices – Having non-electrical feature – Loudspeakers driven in given phase relationship
Patent

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Telescopic transducer mounts

Electrical audio signal processing systems and devices – Having non-electrical feature
Reexamination Certificate

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Tilt adjuster for a speaker support frame

Electrical audio signal processing systems and devices – Having non-electrical feature
Patent

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Ultralight loudspeaker enclosures

Electrical audio signal processing systems and devices – Having non-electrical feature
Patent

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User selectable noise canceling for portable microphones

Electrical audio signal processing systems and devices – Having non-electrical feature – Having microphone
Patent

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Vest with piezoelectric transducer for practicing music

Electrical audio signal processing systems and devices – Having non-electrical feature – And loudspeaker
Reexamination Certificate

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Woofer speaker mounting structure for portable computer

Electrical audio signal processing systems and devices – Having non-electrical feature – And loudspeaker
Reexamination Certificate

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