PIPE HANDLING APPARATUS,申请号USD3446284-传众专利搜索

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发明名称	PIPE HANDLING APPARATUS
摘要
申请公布号	US3446284(A)	申请公布日期	1969.05.27
申请号	USD3446284	申请日期	1967.09.15
申请人	DRESSER IND. INC.	发明人	NORMAN D. DYER;ROY L. VAN WINKLE
分类号	E21B19/16;E21B19/20;(IPC1-7):E21B19/16;E21B17/02	主分类号	E21B19/16
代理机构		代理人
主权项
地址

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