4. Electrical audio signal processing systems and devices
  5. Hearing aids, electrical
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Universal self-attaching inductive coupling unit for connecting

Electrical audio signal processing systems and devices – Hearing aids – electrical – Specified casing or housing
Patent

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Universal-fit hearing device

Electrical audio signal processing systems and devices – Hearing aids – electrical – Specified casing or housing
Reexamination Certificate

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Use of mouth position and mouth movement to filter noise...

Electrical audio signal processing systems and devices – Hearing aids – electrical – Specified casing or housing
Reexamination Certificate

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User disposable sleeve for use within the ear canal

Electrical audio signal processing systems and devices – Hearing aids – electrical – Specified casing or housing
Reexamination Certificate

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User disposable sleeve for use within the ear canal

Electrical audio signal processing systems and devices – Hearing aids – electrical – Specified casing or housing
Reexamination Certificate

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