Dispositif et couplage pour le comptage des communications d'abonnés dans les installations téléphoniques et télégraphiques,申请号FRD717997-传众专利搜索

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发明名称	Dispositif et couplage pour le comptage des communications d'abonnés dans les installations téléphoniques et télégraphiques
摘要
申请公布号	FR717997(A)	申请公布日期	1932.01.16
申请号	FRD717997	申请日期	1931.06.01
申请人		发明人
分类号	H04L12/14;H04M15/38	主分类号	H04L12/14
代理机构		代理人
主权项
地址

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