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经营范围
发明名称
WELL TOOLS
摘要
申请公布号
US3457991(A)
申请公布日期
1969.07.29
申请号
USD3457991
申请日期
1968.02.16
申请人
PHILLIP S. SIZER;DONALD F. TAYLOR JR.
发明人
PHILLIP S. SIZER;DONALD F. TAYLOR JR.
分类号
E21B33/064;E21B34/00;E21B34/04;(IPC1-7):E21B33/06;E21B33/12
主分类号
E21B33/064
代理机构
代理人
主权项
地址
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