Title:
掘削方法
Document Type and Number:
Japanese Patent JP4467948
Kind Code:
B2
Inventors:
Mineya Takeishi
Application Number:
JP2003374345A
Publication Date:
May 26, 2010
Filing Date:
November 04, 2003
Export Citation:
Assignee:
Japan Basic Technology Co., Ltd.
International Classes:
E21B7/20; E02D7/00; E02D7/20; E02D7/22; E21D1/03
Domestic Patent References:
| JP10030229A | ||||
| JP5033340A | ||||
| JP11256157A | ||||
| JP2789219B2 | ||||
| JP2503045B2 | ||||
| JP2003003780A | ||||
| JP2002121737A | ||||
| JP2000096970A | ||||
| JP2002349171A | ||||
| JP2003253982A |
Attorney, Agent or Firm:
Furuya Fumio