DOWNHOLE LOCK SYSTEM,申请号GB19850028535-传众专利搜索

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发明名称	DOWNHOLE LOCK SYSTEM
摘要
申请公布号	GB8528535(D0)	申请公布日期	1985.12.24
申请号	GB19850028535	申请日期	1985.11.20
申请人	OTIS ENG CORPORATION	发明人
分类号	E21B23/02;E21B23/04;E21B34/00;E21B34/10;(IPC1-7):E21B23/04	主分类号	E21B23/02
代理机构		代理人
主权项
地址

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