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发明名称
SONIC DRILL HEAD
摘要
申请公布号
EP1399639(B1)
申请公布日期
2006.01.25
申请号
EP20020709719
申请日期
2002.02.26
申请人
DIEDRICH DRILL, INC.
发明人
SMITH, BRIAN;LANGE, JAMES E.
分类号
E21B7/24;F16F1/32
主分类号
E21B7/24
代理机构
代理人
主权项
地址
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