Title:
拡径掘削用工具
Document Type and Number:
Japanese Patent JP4314432
Kind Code:
B2
Inventors:
Genma Satoshi
Hiroyuki Yamaguchi
Go Arai
Hiroyuki Yamaguchi
Go Arai
Application Number:
JP2003364105A
Publication Date:
August 19, 2009
Filing Date:
October 24, 2003
Export Citation:
Assignee:
Nippon Jiko Co., Ltd.
International Classes:
E21B10/32; E21B7/00
Domestic Patent References:
| JP62003888U | ||||
| JP9060467A | ||||
| JP11062452A | ||||
| JP2000282463A |
Attorney, Agent or Firm:
Mamoru Taniyama