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发明名称
Appareil et installation de contrôle téléphonique
摘要
申请公布号
FR786245(A)
申请公布日期
1935.08.29
申请号
FRD786245
申请日期
1934.05.16
申请人
发明人
RENE LEON JACQUES LAURENT DE LA VILLE
分类号
H04M15/30;H04M17/02
主分类号
H04M15/30
代理机构
代理人
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地址
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