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经营范围
发明名称
WELL PIPE CONNECTOR
摘要
申请公布号
US3420303(A)
申请公布日期
1969.01.07
申请号
USD3420303
申请日期
1967.12.13
申请人
DICKEN MFG. CO.
发明人
ROBERT EDWARD STEARNS
分类号
E21B33/00;(IPC1-7):E21B41/00;F16L39/00
主分类号
E21B33/00
代理机构
代理人
主权项
地址
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