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经营范围
发明名称
ANORDNING FOR SENTRERING AV FORINGSROER.
摘要
申请公布号
NO892297(D0)
申请公布日期
1989.06.05
申请号
NO19890002297
申请日期
1989.06.05
申请人
HARREL, JOHN;HARREL, CHARLENA
发明人
MCARTHUR, JAMES R.;MAYBERRY, JOHN;HARELL, JOHN
分类号
E21B;E21B19/16;(IPC1-7):E21B/
主分类号
E21B
代理机构
代理人
主权项
地址
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