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发明名称
Perfectionnements aux systèmes électriques pour la transmission de messages entre un certain nombre de stations
摘要
申请公布号
FR794930(A)
申请公布日期
1936.02.28
申请号
FRD794930
申请日期
1935.05.23
申请人
"LE MATERIEL TELEPHONIQUE" SOCIETE ANONYME
发明人
分类号
H04J1/00;H04M7/16
主分类号
H04J1/00
代理机构
代理人
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