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Portable sound speaker system and driving circuit therefor

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

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Sound isolation cabinet using two sound sources to generate...

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

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Sound reproduction system and method

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

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Spa audio system

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

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Spa audio system

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

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Speaker system and method of controlling directivity thereof

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

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Spherical loudspeaker for omnipresent sound reproduction

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