Title:
掘削工具
Document Type and Number:
Japanese Patent JP4983762
Kind Code:
B2
Inventors:
Kazuyoshi Nakamura
Hitoya Hisada
Hitoya Hisada
Application Number:
JP2008247756A
Publication Date:
July 25, 2012
Filing Date:
September 26, 2008
Export Citation:
Assignee:
Mitsubishi Materials Corporation
International Classes:
E21B43/10; E21B6/02; E21B43/00
Domestic Patent References:
| JP2008255685A | ||||
| JP2010001672A | ||||
| JP2010001675A | ||||
| JP2010077699A | ||||
| JP3198087B2 | ||||
| JP2005054486A |
Attorney, Agent or Firm:
Masatake Shiga
Tadashi Takahashi
Yasuhiko Murayama
Noriko Yanai
Tadashi Takahashi
Yasuhiko Murayama
Noriko Yanai