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经营范围
发明名称
Tool joint
摘要
申请公布号
US1947909(A)
申请公布日期
1934.02.20
申请号
US19300451639
申请日期
1930.05.12
申请人
BYRON JACKSON CO.
发明人
HOLLANDER ALADAR
分类号
E21B17/042
主分类号
E21B17/042
代理机构
代理人
主权项
地址
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