Perfectionnements aux systèmes de signalisation électriques, notamment aux systèmes téléphoniques,申请号FRD1146581-传众专利搜索

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发明名称	Perfectionnements aux systèmes de signalisation électriques, notamment aux systèmes téléphoniques
摘要
申请公布号	FR1146581(A)	申请公布日期	1957.11.13
申请号	FRD1146581	申请日期	1955.11.15
申请人	AUTOMATIC TELEPHONE & ELECTRIC COMPANY LIMITED	发明人
分类号	H04M15/08;H04Q3/00	主分类号	H04M15/08
代理机构		代理人
主权项
地址

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