4. Recording, communication, or information retrieval equipment
  5. Computer, data processor equipment

Erazm A. Willy

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Combined speaker diaphragm and baffle therefor

Recording – communication – or information retrieval equipment – Computer – data processor equipment
Patent

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Electroacoustic transducer having a variable thickness diaphragm

Acoustics – Anatomic or prosthetic relation – Ear and mouth
Patent

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Speaker diaphragm

Recording – communication – or information retrieval equipment – Computer – data processor equipment
Patent

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Profile ID: LFUS-PAI-P-1403358

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