Railway traffic governing apparatus,申请号US19340736037-传众专利搜索

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发明名称	Railway traffic governing apparatus
摘要
申请公布号	US2085891(A)	申请公布日期	1937.07.06
申请号	US19340736037	申请日期	1934.07.19
申请人	THE UNION SWITCH & SIGNAL COMPANY	发明人	BELL CHARLES W.
分类号	B61L5/04	主分类号	B61L5/04
代理机构		代理人
主权项
地址

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