Improvements relating to light signals,申请号GB19470007110-传众专利搜索

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发明名称	Improvements relating to light signals
摘要
申请公布号	GB639051(A)	申请公布日期	1950.06.21
申请号	GB19470007110	申请日期	1947.03.14
申请人	WESTINGHOUSE BRAKE & SIGNAL COMPANY LIMITED	发明人
分类号	B61L5/18	主分类号	B61L5/18
代理机构		代理人
主权项
地址

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