Railway track structure,申请号US19280305094-传众专利搜索

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发明名称	Railway track structure
摘要
申请公布号	US1743598(A)	申请公布日期	1930.01.14
申请号	US19280305094	申请日期	1928.09.10
申请人	COON LOUIS M	发明人	COON LOUIS M.
分类号	E01B3/22	主分类号	E01B3/22
代理机构		代理人
主权项
地址

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