Pipeline servicing tool,申请号US19880256454-传众专利搜索

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发明名称	Pipeline servicing tool
摘要
申请公布号	US4875523(A)	申请公布日期	1989.10.24
申请号	US19880256454	申请日期	1988.10.12
申请人	CAMERON IRON WORKS USA, INC.	发明人	THORNBURROW, EDWARD T.
分类号	E21B4/02;E21B29/00;E21B33/068;F16L55/10	主分类号	E21B4/02
代理机构		代理人
主权项
地址

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