Perfectionnements aux systèmes pour l'interconnexion d'appareils télégraphiques dans des bureaux centraux,申请号FRD711676-传众专利搜索

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发明名称	Perfectionnements aux systèmes pour l'interconnexion d'appareils télégraphiques dans des bureaux centraux
摘要
申请公布号	FR711676(A)	申请公布日期	1931.09.15
申请号	FRD711676	申请日期	1930.05.27
申请人	LE MATERIEL TELEPHONIQUE	发明人
分类号	H04L12/00	主分类号	H04L12/00
代理机构		代理人
主权项
地址

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