4. Recording, communication, or information retrieval equipment
  5. Video or audio transmission, recording or playback equipment
  6. Speaker or housing therefor

Matthew S. Polk, Jr.

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Compact audio reproduction system with large perceived...

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

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Enclosed speaker for vehicle use

Recording – communication – or information retrieval equipment – Video or audio transmission – recording or playback equipment – Speaker or housing therefor
Patent

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Enhanced multi-channel audio surround sound from front...

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

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Loudspeaker mounting system

Electrical audio signal processing systems and devices – Electro-acoustic audio transducer – Mounting or support feature of housed loudspeaker
Reexamination Certificate

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Loudspeaker-cable interface

Amplifiers – Hum or noise or distortion bucking introduced into signal...
Patent

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Profile ID: LFUS-PAI-P-59095

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