Title:
穿孔装置
Document Type and Number:
Japanese Patent JP4892761
Kind Code:
B2
Inventors:
Kazuo Haga
Application Number:
JP2007250425A
Publication Date:
March 07, 2012
Filing Date:
September 27, 2007
Export Citation:
Assignee:
Yamamoto Rock Machine Co., Ltd.
International Classes:
E21B6/04
Domestic Patent References:
| JP2009541617A | ||||
| JP2000054774A | ||||
| JP2004353357A | ||||
| JP2004232459A | ||||
| JP2003074280A | ||||
| JP2003193782A | ||||
| JP61204496A | ||||
| JP6108770A | ||||
| JP10037645A | ||||
| JP2613538B2 | ||||
| JP7021679Y2 | ||||
| JP7301073A |
Attorney, Agent or Firm:
Sadanobu Shimizu