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发明名称
Impact absorbing protector for internally threaded pipe ends
摘要
申请公布号
US3056427(A)
申请公布日期
1962.10.02
申请号
US19590846511
申请日期
1959.10.14
申请人
HIGGINS EDWARD F
发明人
HIGGINS EDWARD F.
分类号
E21B17/042;F16L57/00
主分类号
E21B17/042
代理机构
代理人
主权项
地址
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