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经营范围
发明名称
INFLATABLE,PERMANENTLY SET,DRILLABLE ELEMENT
摘要
申请公布号
US3529667(A)
申请公布日期
1970.09.22
申请号
USD3529667
申请日期
1969.01.10
申请人
LYNES INC.
发明人
BILLY C. MALONE
分类号
E21B33/12;E21B33/127;E21B33/1295;(IPC1-7):E21B33/12
主分类号
E21B33/12
代理机构
代理人
主权项
地址
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