Apparatus for handling pipe in a derrick,申请号US19510254783-传众专利搜索

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发明名称	Apparatus for handling pipe in a derrick
摘要
申请公布号	US2747751(A)	申请公布日期	1956.05.29
申请号	US19510254783	申请日期	1951.11.03
申请人	HUMBLE OIL & REFINING COMPANY	发明人	STONE ALBERT L.;ESTATES PALOS VERDES;DAVERIN GEORGE E.
分类号	E21B19/02;E21B19/14	主分类号	E21B19/02
代理机构		代理人
主权项
地址

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