Title:
循環式掘削装置
Document Type and Number:
Japanese Patent JP4693730
Kind Code:
B2
More Like This:
Inventors:
Yoshihito Sugisaki
Atsushi Ohara
Atsushi Ohara
Application Number:
JP2006253576A
Publication Date:
June 01, 2011
Filing Date:
September 19, 2006
Export Citation:
Assignee:
Sugisaki Foundation Co., Ltd.
Hitachi Construction Machinery Co., Ltd.
Hitachi Construction Machinery Co., Ltd.
International Classes:
E21B3/02
Domestic Patent References:
| JP2005126922A | ||||
| JP2002047648A |
Attorney, Agent or Firm:
Katsuichi Wakata