Boresystem med lukket sl÷yfe,申请号NO19980001802-传众专利搜索

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发明名称	Boresystem med lukket sl÷yfe
摘要
申请公布号	NO981802(D0)	申请公布日期	1998.04.22
申请号	NO19980001802	申请日期	1998.04.22
申请人	BAKER HUGHES INC	发明人	HARRELL, JOHN W.;DUBINSKY, VLADIMIR;LEGGETT, JAMES;HUTCHINSON, MARK
分类号	E21B7/06;E21B44/00;E21B47/00;E21B47/18;(IPC1-7):E21B	主分类号	E21B7/06
代理机构		代理人
主权项
地址

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