Perfectionnements aux systèmes de téléphonie automatique, notamment pour réseaux ruraux,申请号FRD706933-传众专利搜索

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发明名称	Perfectionnements aux systèmes de téléphonie automatique, notamment pour réseaux ruraux
摘要
申请公布号	FR706933(A)	申请公布日期	1931.07.01
申请号	FRD706933	申请日期	1930.11.25
申请人	COMPAGNIE DES TELEPHONES THOMSON-HOUSTON	发明人
分类号	H04Q3/00	主分类号	H04Q3/00
代理机构		代理人
主权项
地址

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