Oil field derrick post,申请号US19340710272-传众专利搜索

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发明名称	Oil field derrick post
摘要
申请公布号	US2031002(A)	申请公布日期	1936.02.18
申请号	US19340710272	申请日期	1934.02.08
申请人	MOORE LEE C	发明人	MOORE LEE C.
分类号	E21B15/00	主分类号	E21B15/00
代理机构		代理人
主权项
地址

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