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经营范围
发明名称
Perfectionnements aux systèmes de reproduction des sons
摘要
申请公布号
FR48909(E)
申请公布日期
1938.09.21
申请号
FRD48909
申请日期
1937.03.31
申请人
发明人
WARNIER ALBERT, HENRI, MARIE, JEAN
分类号
G11B7/00
主分类号
G11B7/00
代理机构
代理人
主权项
地址
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