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发明名称
Cutter for well drills
摘要
申请公布号
US2038386(A)
申请公布日期
1936.04.21
申请号
US19350010254
申请日期
1935.03.09
申请人
HUGHES TOOL COMPANY
发明人
SCOTT FLOYD L.;SCHAEFFER HERMAN A.
分类号
E21B10/16
主分类号
E21B10/16
代理机构
代理人
主权项
地址
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