LOW-TEMPERATURE PACKER,申请号USD3438442-传众专利搜索

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发明名称	LOW-TEMPERATURE PACKER
摘要
申请公布号	US3438442(A)	申请公布日期	1969.04.15
申请号	USD3438442	申请日期	1966.07.29
申请人	SHELL OIL CO.	发明人	JOHN A. PRYOR;CHESTER J. FRAZIER JR.;LAWRENCE L. SMITH;JOHN A. STANZIONE
分类号	E21B36/00;(IPC1-7):E21B43/24	主分类号	E21B36/00
代理机构		代理人
主权项
地址

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