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发明名称
Thread box tool protector
摘要
申请公布号
US2971669(A)
申请公布日期
1961.02.14
申请号
US19580746766
申请日期
1958.07.07
申请人
LE BUS ROYALTY COMPANY
发明人
SR. FRANKLIN L. LE BUS,
分类号
E21B17/00
主分类号
E21B17/00
代理机构
代理人
主权项
地址
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