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经营范围
发明名称
Procédé et dispositif pour la reproduction électromagnétique du son
摘要
申请公布号
FR676389(A)
申请公布日期
1930.02.21
申请号
FRD676389
申请日期
1929.06.08
申请人
发明人
FAGAN JAMES-BERNARD
分类号
H04R11/00
主分类号
H04R11/00
代理机构
代理人
主权项
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