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发明名称
DRILLING APPARATUS
摘要
申请公布号
US3426855(A)
申请公布日期
1969.02.11
申请号
USD3426855
申请日期
1967.02.06
申请人
GLOBAL MARINE INC.
发明人
ROBERT CURTIS CROOKE;NICK KOOT
分类号
E21B3/02;E21B7/12;E21B15/02;E21B19/00;E21B19/20;(IPC1-7):E21C7/04;E21B3/04;E21C7/00
主分类号
E21B3/02
代理机构
代理人
主权项
地址
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