Title:
杭孔掘削方法
Document Type and Number:
Japanese Patent JP5189946
Kind Code:
B2
Inventors:
Tadayoshi Ishibashi
Katsuhiko Osako
Koichi Yoshida
Akira Ohba
Taniguchi Yoshinori
Tsutomu Takeya
Hirofumi Ikemoto
Katsuhiko Osako
Koichi Yoshida
Akira Ohba
Taniguchi Yoshinori
Tsutomu Takeya
Hirofumi Ikemoto
Application Number:
JP2008260697A
Publication Date:
April 24, 2013
Filing Date:
October 07, 2008
Export Citation:
Assignee:
East Japan Railway Company
International Classes:
E21B3/02
Domestic Patent References:
| JP7238777A | ||||
| JP2003301683A | ||||
| JP2007039921A | ||||
| JP2005023773A |
Attorney, Agent or Firm:
Yoshiki Hasegawa
Yoshiki Kuroki
Yoshiki Kuroki