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发明名称
Accessory for a drill or the like
摘要
申请公布号
US2990024(A)
申请公布日期
1961.06.27
申请号
US19590817345
申请日期
1959.06.01
申请人
AMERICAN SEATING COMPANY
发明人
ALLSBURG ROBERT G. VAN
分类号
B23Q11/00;E21B21/015
主分类号
B23Q11/00
代理机构
代理人
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