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经营范围
发明名称
Perfectionnements aux distorsiomètres télégraphiques
摘要
申请公布号
FR897903(A)
申请公布日期
1945.04.05
申请号
FRD897903
申请日期
1943.05.11
申请人
SOCIETE D'ETUDES POUR LIAISONS TELEPHONIQUES ET TELEGRAPHIQUES A LONGUE DISTANE;ETABLISSEMENTS EDOUARD BELIN
发明人
分类号
H04L12/26;H04L25/04
主分类号
H04L12/26
代理机构
代理人
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地址
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