4. Electrical audio signal processing systems and devices
  5. Electro-acoustic audio transducer
  6. Electromagnetic

Lewis Athanas

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Mechanical-to-acoustical transformer and multi-media flat...

Electrical generator or motor structure – Non-dynamoelectric – Piezoelectric elements and devices
Reexamination Certificate

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Mechanical-to-acoustical transformer and multi-media flat...

Electrical generator or motor structure – Non-dynamoelectric – Piezoelectric elements and devices
Reexamination Certificate

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Planar-type loudspeaker with at least two diaphragms

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

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Profile ID: LFUS-PAI-P-2442304

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