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Title:
Ground drill
Document Type and Number:
Japanese Patent JP6147029
Kind Code:
B2
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Inventors:
Tokuo Murate
Application Number:
JP2013038483A
Publication Date:
June 14, 2017
Filing Date:
February 28, 2013
Export Citation:
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Assignee:
Nippon Vehicle Manufacturing Co., Ltd.
International Classes:
E21B11/00; E21B15/00
Domestic Patent References:
JP2000120363A
JP63161292U
JP2008190197A
JP62025691A
JP2009046866A
JP63161291U
JP63183188U
JP2003054876A
JP3113386U
JP48014051A
JP34016142Y1
JP5213584A
JP2003090191A
Foreign References:
US4489838
US4166542
Attorney, Agent or Firm:
Kazuhiko Kido
Yoshihiko Kido



 
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