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发明名称
Lubricator for drill bit
摘要
申请公布号
US3230020(A)
申请公布日期
1966.01.18
申请号
US19630295892
申请日期
1963.07.18
申请人
REED ROLLER BIT COMPANY
发明人
GILBERT GEORGE J.;JR. PERCY W. SCHUMACHER,
分类号
E21B10/24
主分类号
E21B10/24
代理机构
代理人
主权项
地址
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