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发明名称
Perfectionnements aux dispositifs de téléphonie et télégraphie multiples sur courant porteur à fréquence unique
摘要
申请公布号
FR46327(E)
申请公布日期
1936.04.30
申请号
FRD46327
申请日期
1935.01.19
申请人
LA RADIO-INDUSTRIE
发明人
LOTH WILLIAM-ARTHUR;GIVELET JOSEPH-ARMAND
分类号
H04J7/02;H04M11/06
主分类号
H04J7/02
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代理人
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