Title:
ドリルヘッド
Document Type and Number:
Japanese Patent JP4940480
Kind Code:
B2
More Like This:
Inventors:
Kazuo Haga
Yoshikazu Yatani
Yoshikazu Yatani
Application Number:
JP2009206733A
Publication Date:
May 30, 2012
Filing Date:
September 08, 2009
Export Citation:
Assignee:
Yamamoto Rock Machine Co., Ltd.
International Classes:
E21B6/02; E21B17/02; E21B17/05
Domestic Patent References:
JP2001173358A | ||||
JP10037645A | ||||
JP4077689U | ||||
JP6071587U | ||||
JP7020387U |
Attorney, Agent or Firm:
Sadanobu Shimizu