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经营范围
发明名称
Système de transmission
摘要
申请公布号
FR37104(E)
申请公布日期
1930.10.15
申请号
FRD37104
申请日期
1929.05.31
申请人
ELECTRICAL RESEARCH PRODUCTS INC
发明人
分类号
H03B19/03;H04L25/03;H04L25/06;H04L25/18;H04L25/24
主分类号
H03B19/03
代理机构
代理人
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地址
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