Railroad crossing structure,申请号US19300484673-传众专利搜索

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发明名称	Railroad crossing structure
摘要
申请公布号	US1946448(A)	申请公布日期	1934.02.06
申请号	US19300484673	申请日期	1930.09.26
申请人	TRUSCON STEEL COMPANY	发明人	WHITE HERBERT E.;MCLAUGHLIN THOMAS E.
分类号	E01C9/04	主分类号	E01C9/04
代理机构		代理人
主权项
地址

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