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经营范围
发明名称
Cellule microphonique
摘要
申请公布号
FR782114(A)
申请公布日期
1935.05.28
申请号
FRD782114
申请日期
1934.02.21
申请人
发明人
RENE FERQUIN
分类号
H04R21/02
主分类号
H04R21/02
代理机构
代理人
主权项
地址
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