Title:
二重管掘削装置およびその工法
Document Type and Number:
Japanese Patent JP4728898
Kind Code:
B2
Inventors:
Tanigaki Kazunobu
Yukihisa Inazumi
Yukihisa Inazumi
Application Number:
JP2006194959A
Publication Date:
July 20, 2011
Filing Date:
July 14, 2006
Export Citation:
Assignee:
Tanigaki Kenko Co., Ltd.
Mining Industry Co., Ltd.
Mining Industry Co., Ltd.
International Classes:
E21B3/04; E21B4/14; E21B10/32; E21B17/07
Domestic Patent References:
| JP2002256788A | ||||
| JP2001182060A | ||||
| JP11107665A | ||||
| JP2080187U | ||||
| JP2000274173A | ||||
| JP11141257A | ||||
| JP2000274174A |
Attorney, Agent or Firm:
Yoshihisa Nishi