发明名称 Hearing aid
摘要 A hearing aid to be worn in the ear, particularly a concha or auditory-canal device with a housing containing or exhibiting microphone, amplifier, receiver, switch, volume control and a microphone opening and the like, the contour of which housing is essentially constructed to be D-shaped. <IMAGE>
申请公布号 DE3907839(A1) 申请公布日期 1989.09.28
申请号 DE19893907839 申请日期 1989.03.10
申请人 HUEBER, FRITZ, ING., WIEN, AT 发明人 HUEBER, FRITZ, ING., WIEN, AT
分类号 H04R25/02 主分类号 H04R25/02
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