Title:
接地用孔のさく孔方法及びそれに使用するさく孔装置
Document Type and Number:
Japanese Patent JP4224596
Kind Code:
B2
Inventors:
Fukushima Shigeo
Application Number:
JP2002147858A
Publication Date:
February 18, 2009
Filing Date:
May 22, 2002
Export Citation:
Assignee:
Technical Earth System Co., Ltd.
International Classes:
E21B7/02; E21B15/00; E21B3/00; E21B19/08
Domestic Patent References:
| JP2000195580A | ||||
| JP10148089A | ||||
| JP2001148274A | ||||
| JP3265556A | ||||
| JP7153542A | ||||
| JP10208840A | ||||
| JP4293890A | ||||
| JP5256080A | ||||
| JP7080452A | ||||
| JP2001248375A | ||||
| JP60091629U | ||||
| JP2148588A | ||||
| JP10284151A | ||||
| JP2000150016A | ||||
| JP2001313141A |
Attorney, Agent or Firm:
Hiroshi Sugawara
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