Controlling apparatus for highway crossing signals,申请号US19350014891-传众专利搜索

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发明名称	Controlling apparatus for highway crossing signals
摘要
申请公布号	US2069874(A)	申请公布日期	1937.02.09
申请号	US19350014891	申请日期	1935.04.05
申请人	THE UNION SWITCH & SIGNAL COMPANY	发明人	CRAGO PAUL H.
分类号	B61L29/28	主分类号	B61L29/28
代理机构		代理人
主权项
地址

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