Control apparatus for highway crossing signals,申请号US19420434037-传众专利搜索

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发明名称	Control apparatus for highway crossing signals
摘要
申请公布号	US2356453(A)	申请公布日期	1944.08.22
申请号	US19420434037	申请日期	1942.03.10
申请人	THE UNION SWITCH AND SIGNAL COMPANY	发明人	FEREDAY FREDERICK T.
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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