发明公开
EP1797274A4 A DRILLING APPARATUS HAVING IN-LINE EXTENDING WINGS AND DRIVING METHOD THEREOF
有权
具有扩展单轨翅膀,干燥及其方法DRILL
- 专利标题: A DRILLING APPARATUS HAVING IN-LINE EXTENDING WINGS AND DRIVING METHOD THEREOF
- 专利标题(中): 具有扩展单轨翅膀,干燥及其方法DRILL
-
申请号: EP05808413申请日: 2005-09-02
-
公开(公告)号: EP1797274A4公开(公告)日: 2012-05-02
- 发明人: EVERDIGM ROCK TOOLS CORP
- 申请人: EVERDIGM ROCK TOOLS CORP
- 专利权人: EVERDIGM ROCK TOOLS CORP
- 当前专利权人: EVERDIGM ROCK TOOLS CORP
- 优先权: KR20040070565 2004-09-03
- 主分类号: E21B1/30
- IPC分类号: E21B1/30 ; E21B7/20
信息查询