4. Electrical audio signal processing systems and devices
  5. Hearing aids, electrical
  6. Specified casing or housing
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Wax barrier system

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

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Whole surface driven speaker

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

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Wireless hands-free conference telephone system

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

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Wireless open ear canal earpiece

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

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Written language parser system

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

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