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发明名称
Systèmes utilisés pour l'envoi de courants électriques modulés à des dispositifs électromagnétiques
摘要
申请公布号
FR832345(A)
申请公布日期
1938.09.26
申请号
FRD832345
申请日期
1938.01.21
申请人
ELECTRICAL RESEARCH PRODUCTS INC.
发明人
分类号
G11B7/00
主分类号
G11B7/00
代理机构
代理人
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地址
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