Title:
オールケーシング掘削装置
Document Type and Number:
Japanese Patent JP4308410
Kind Code:
B2
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Inventors:
Akira Iwakura
Application Number:
JP2000158166A
Publication Date:
August 05, 2009
Filing Date:
May 29, 2000
Export Citation:
Assignee:
Nippon Vehicle Manufacturing Co., Ltd.
International Classes:
E21B3/025; E02D7/20; E02D7/22; E02D11/00
Domestic Patent References:
| JP9184139A | ||||
| JP11210365A | ||||
| JP8165877A | ||||
| JP11303559A | ||||
| JP46031008Y1 | ||||
| JP11019099A |
Attorney, Agent or Firm:
Tsutomu Adachi
Toshihiro Tanaka
Toshihiro Tanaka