Perfectionnements aux systèmes téléphoniques, particulièrement aux systèmes dénommés de cordes à secret,申请号FRD54002-传众专利搜索

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发明名称	Perfectionnements aux systèmes téléphoniques, particulièrement aux systèmes dénommés de cordes à secret
摘要
申请公布号	FR54002(E)	申请公布日期	1947.03.27
申请号	FRD54002	申请日期	1943.09.23
申请人	COMPAGNIE GENERALE DE CONSTRUCTIONS TELEPHONIQUES	发明人
分类号	H04M9/00	主分类号	H04M9/00
代理机构		代理人
主权项
地址

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