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CPC Subgroup
H04R 1/04

Structural association of microphone with electric circuitry therefor (in electric hearing aids H04R25/00)

Full Title

Details of transducers, > Casings; Cabinets Mountings therein (H04R1/28 takes precedence ) > Structural association of microphone with electric circuitry therefor (in electric hearing aids H04R25/00)