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

Frank Frielingsdorf

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Bone conduction microphone with mounting means

Electrical audio signal processing systems and devices – Electro-acoustic audio transducer – Body contact wave transfer
Patent

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Collapsible headset

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

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Microphone mounting for a person's neck

Electrical audio signal processing systems and devices – Electro-acoustic audio transducer – Body contact wave transfer
Patent

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Phonograph cartridge

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

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Profile ID: LFUS-PAI-P-1368179

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