4. Recording, communication, or information retrieval equipment
  5. Video or audio transmission, recording or playback equipment
  6. Public address system

Chao-Chih Chang

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Acoustoeletric transformation chip for ribbon microphone

Electrical audio signal processing systems and devices – Electro-acoustic audio transducer – Microphone capsule only
Reexamination Certificate

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Adjustable holder for an acoustic pick-up device

Electrical audio signal processing systems and devices – Electro-acoustic audio transducer – Housed microphone
Reexamination Certificate

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Clamping device for anchoring a microphone to an instrument

Tools – Tool jaw – Antipodal jaw surfaces move apart as handles approach
Reexamination Certificate

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Condenser microphone and method for making the same

Electrical audio signal processing systems and devices – Electro-acoustic audio transducer – Having electrostatic element
Reexamination Certificate

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Condenser microphone and method for making the same

Electrical audio signal processing systems and devices – Electro-acoustic audio transducer – Microphone capsule only
Reexamination Certificate

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Profile ID: LFUS-PAI-P-1735604

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