4. Electrical audio signal processing systems and devices
  5. Hearing aids, electrical
  6. Programming interface circuitry

Garry Richardson

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Hearing aid with digital compression recapture

Electrical audio signal processing systems and devices – Including amplitude or volume control – Automatic
Reexamination Certificate

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Hearing aid with digital compression recapture

Electrical audio signal processing systems and devices – Including amplitude or volume control – Automatic
Reexamination Certificate

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Low power sigma delta modulator

Coded data generation or conversion – Analog to or from digital conversion – Differential encoder and/or decoder
Reexamination Certificate

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Portable system for programming hearing aids

Electrical audio signal processing systems and devices – Hearing aids – electrical – Programming interface circuitry
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Profile ID: LFUS-PAI-P-2318506

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