Perfectionnements aux systèmes téléphoniques,申请号FRD1137857-传众专利搜索

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发明名称	Perfectionnements aux systèmes téléphoniques
摘要
申请公布号	FR1137857(A)	申请公布日期	1957.06.05
申请号	FRD1137857	申请日期	1955.10.28
申请人	COMPAGNIE GENERALE DE CONSTRUCTIONS TELEPHONIQUES	发明人
分类号	H04M1/26	主分类号	H04M1/26
代理机构		代理人
主权项
地址

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