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经营范围
发明名称
ANCHORING DEVICE
摘要
申请公布号
US3422897(A)
申请公布日期
1969.01.21
申请号
USD3422897
申请日期
1966.08.16
申请人
BAKER OIL TOOLS INC.
发明人
MARTIN B. CONRAD
分类号
E21B23/04;E21B33/127;E21B33/129;E21B33/1295;(IPC1-7):E21B33/12;E21B33/12
主分类号
E21B23/04
代理机构
代理人
主权项
地址
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