Apparatus for moving pipe into and out of an oil well derrick,申请号US19540476363-传众专利搜索

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发明名称	Apparatus for moving pipe into and out of an oil well derrick
摘要
申请公布号	US2999605(A)	申请公布日期	1961.09.12
申请号	US19540476363	申请日期	1954.12.20
申请人	PAUL A. MEDEARIS	发明人	JARNETT FRANK D. DE
分类号	E21B19/15	主分类号	E21B19/15
代理机构		代理人
主权项
地址

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