Title:
掘削装置及び掘削工法
Document Type and Number:
Japanese Patent JP4768877
Kind Code:
B1
Inventors:
Hideki Kozuka
Application Number:
JP2010261386A
Publication Date:
September 07, 2011
Filing Date:
November 24, 2010
Export Citation:
Assignee:
Aoba Construction Machinery Co., Ltd.
International Classes:
E21B7/00; E21B3/02; E21B10/64
Domestic Patent References:
| JP2000274174A | 2000-10-03 | |||
| JP2000320282A | 2000-11-21 | |||
| JP2002275892A | 2002-09-25 | |||
| JP2008019688A | 2008-01-31 |
Attorney, Agent or Firm:
Takahide Goto