Title:
掘削装置、掘削装置を備えた回転式掘削機及び地中掘削工法
Document Type and Number:
Japanese Patent JP4076554
Kind Code:
B2
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Inventors:
Kazunori Furuki
Application Number:
JP2005341142A
Publication Date:
April 16, 2008
Filing Date:
November 25, 2005
Export Citation:
Assignee:
Kazunori Furuki
International Classes:
E21B4/06; E21B6/00
Domestic Patent References:
| JP9328983A | ||||
| JP9177462A | ||||
| JP61092288A | ||||
| JP6084717B2 | ||||
| JP3425390B2 |
Foreign References:
| KR545714B1 |
Attorney, Agent or Firm:
Katsuhiko Kajiwara