Système de signalisation à courant alternatif,申请号FRD56660-传众专利搜索

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发明名称	Système de signalisation à courant alternatif
摘要
申请公布号	FR56660(E)	申请公布日期	1952.10.02
申请号	FRD56660	申请日期	1947.06.18
申请人	INTERNATIONAL STANDARD ELECTRIC CORPORATION	发明人	HERTOG MARTINUS DEN;WRIGHT ESMOND PHILIP GOODWIN
分类号	H04Q1/446	主分类号	H04Q1/446
代理机构		代理人
主权项
地址

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