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发明名称
Dispositif facilitant la constatation de la durée des communications téléphoniques
摘要
申请公布号
FR765736(A)
申请公布日期
1934.06.14
申请号
FRD765736
申请日期
1933.12.18
申请人
SOCIETE POUR LA FABRICATION ET LA VENTE DE TOUS OBJETS EN BOIS ET MATIERES PLASTIQUES
发明人
分类号
H04M3/12
主分类号
H04M3/12
代理机构
代理人
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地址
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