Tie for extension trackways,申请号US19330681151-传众专利搜索

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发明名称	Tie for extension trackways
摘要
申请公布号	US2029820(A)	申请公布日期	1936.02.04
申请号	US19330681151	申请日期	1933.07.19
申请人	JAMES H. KEITH	发明人	HARVEY LLOYD E.
分类号	E01B23/04	主分类号	E01B23/04
代理机构		代理人
主权项
地址

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