4. Electrical audio signal processing systems and devices
  5. Electro-acoustic audio transducer
  6. Thermal response to, or generation of, sound vibration

Jack J. Becker

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Voice amplification adapter assembly for face mask

Electrical audio signal processing systems and devices – Megaphones
Patent

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Voice transmission system with remote microphone

Electrical audio signal processing systems and devices – Electro-acoustic audio transducer – Thermal response to – or generation of – sound vibration
Patent

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Wireless voice transmission system

Telecommunications – Transmitter and receiver at same station – Having particular housing or support of a transceiver
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Profile ID: LFUS-PAI-P-495637

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