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发明名称
Appareil électrique contre la surdité
摘要
申请公布号
FR795937(A)
申请公布日期
1936.03.25
申请号
FRD795937
申请日期
1935.10.04
申请人
SONOTONE CORPORATION
发明人
分类号
H04R3/04;H04R23/02
主分类号
H04R3/04
代理机构
代理人
主权项
地址
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