Title:
掘削機の拡大ヘッド開閉装置
Document Type and Number:
Japanese Patent JP5259689
Kind Code:
B2
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Inventors:
Yabuuchi Sadao
Mitsumasa Oigawa
Mitsumasa Oigawa
Application Number:
JP2010284378A
Publication Date:
August 07, 2013
Filing Date:
December 21, 2010
Export Citation:
Assignee:
Japan Pile Co., Ltd.
International Classes:
E21B10/32; E02D7/00; E21B7/00
Domestic Patent References:
| JP55142892A | ||||
| JP2004293264A | ||||
| JP2002161689A | ||||
| JP2004324381A | ||||
| JP2001107330A | ||||
| JP2006016913A | ||||
| JP2002322890A | ||||
| JP2003213679A | ||||
| JP7004169A | ||||
| JP2003064679A | ||||
| JP3662647B2 |
Attorney, Agent or Firm:
Kumon enjoyment
Hisako Yasuko
Hisako Yasuko