Title:
掘削装置
Document Type and Number:
Japanese Patent JP4920352
Kind Code:
B2
Inventors:
Katsumata Takeshige
Takashi Toshishi
Toshihiko Saito
Takashi Toshishi
Toshihiko Saito
Application Number:
JP2006238968A
Publication Date:
April 18, 2012
Filing Date:
September 04, 2006
Export Citation:
Assignee:
Geo Giken Co., Ltd.
Tft inc.
Tft inc.
International Classes:
E21B7/20; E21B15/00
Domestic Patent References:
| JP8144681A | ||||
| JP5025984A | ||||
| JP2005146706A | ||||
| JP5156640A | ||||
| JP10266761A | ||||
| JP2000337073A | ||||
| JP7012590U | ||||
| JP8184040A | ||||
| JP7082743A | ||||
| JP59134292A | ||||
| JP2001248375A | ||||
| JP39014951B1 | ||||
| JP2003172088A |
Attorney, Agent or Firm:
Hisao Kobayashi
Kiyoshi Yasushima
Souji Sasaki
Noboru Omura
Takanashi Norio
Taku Ogawa
Takanashi Norio
Taku Ogawa
Kiyoshi Yasushima
Souji Sasaki
Noboru Omura
Takanashi Norio
Taku Ogawa
Takanashi Norio
Taku Ogawa