Système de signalisation électrique à distance,申请号FRD673132-传众专利搜索

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发明名称	Système de signalisation électrique à distance
摘要
申请公布号	FR673132(A)	申请公布日期	1930.01.10
申请号	FRD673132	申请日期	1929.04.16
申请人	BROWN, BOVERI & COMPAGNIE	发明人
分类号	H04L5/20	主分类号	H04L5/20
代理机构		代理人
主权项
地址

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