4. Electrical audio signal processing systems and devices
  5. Electro-acoustic audio transducer
  6. Having electrostatic element

Elmer V. Carlson

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Acoustic transducer of improved construction

Patent

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Acoustic transducer with improved electret assembly

Patent

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Acoustic transducer with improved electrode spacing

Communications – electrical: acoustic wave systems and devices – Signal transducers – Receivers
Patent

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Acoustic transducer with improved electrode spacing

Communications – electrical: acoustic wave systems and devices – Signal transducers – Receivers
Patent

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Cleanable in-the-ear electroacoustic transducer

Acoustics – Anatomic or prosthetic relation – Ear and mouth
Patent

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Profile ID: LFUS-PAI-P-158056

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