Perfectionnements aux systèmes téléphoniques,申请号FRD1076424-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	FR1076424(A)	申请公布日期	1954.10.26
申请号	FRD1076424	申请日期	1953.04.24
申请人	SOCIETE DES TELEPHONES ERICSSON	发明人
分类号	H04Q3/42	主分类号	H04Q3/42
代理机构		代理人
主权项
地址

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