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发明名称
SONIC HEADS AND ASSEMBLIES AND USES THEREOF
摘要
申请公布号
EP1649133(A1)
申请公布日期
2006.04.26
申请号
EP20040748823
申请日期
2004.06.18
申请人
FLEXIDRILL LIMITED
发明人
PFAHLERT, ROGER
分类号
E02D3/054;E21B7/24;E21B28/00;(IPC1-7):E21B7/24
主分类号
E02D3/054
代理机构
代理人
主权项
地址
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