Portable drilling rig,申请号US19330688554-传众专利搜索

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发明名称	Portable drilling rig
摘要
申请公布号	US2026627(A)	申请公布日期	1936.01.07
申请号	US19330688554	申请日期	1933.09.08
申请人	WORTHINGTON PUMP AND MACHINERY CORPORATION	发明人	GILMAN GEORGE H.
分类号	E21B7/02;E21D9/10;E21D9/12	主分类号	E21B7/02
代理机构		代理人
主权项
地址

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