Title:
さく孔機
Document Type and Number:
Japanese Patent JP4880642
Kind Code:
B2
Inventors:
Toshio Susaki
Shuji Narita
Shuji Narita
Application Number:
JP2008124890A
Publication Date:
February 22, 2012
Filing Date:
May 12, 2008
Export Citation:
Assignee:
Furukawa Rock Drill Co., Ltd.
International Classes:
E21B15/00; E21B7/02
Domestic Patent References:
| JP2007239195A | ||||
| JP61215803A | ||||
| JP62228594A | ||||
| JP2001187903A | ||||
| JP2000265769A | ||||
| JP55138592A | ||||
| JP4012591U |
Attorney, Agent or Firm:
Tetsuya Mori
Yoshiaki Naito
Hide Tanaka Tetsu
Yoshiaki Naito
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