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发明名称
Perfectionnements aux systèmes de communication électriques, par courant porteur modulé, notamment pour communications téléphoniques dans les trains
摘要
申请公布号
FR779696(A)
申请公布日期
1935.04.10
申请号
FRD779696
申请日期
1934.08.03
申请人
SIGNALISATION
发明人
分类号
H04B5/00
主分类号
H04B5/00
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代理人
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地址
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