Title:
さく孔機
Document Type and Number:
Japanese Patent JP6420548
Kind Code:
B2
Inventors:
Yoshihisa Tasato
Application Number:
JP2014017447A
Publication Date:
November 07, 2018
Filing Date:
January 31, 2014
Export Citation:
Assignee:
Furukawa Rock Drill Co., Ltd.
International Classes:
E21B21/01
Domestic Patent References:
| JP10037651A | ||||
| JP2001079445A | ||||
| JP61112096U |
Foreign References:
| US5518299 |
Attorney, Agent or Firm:
Tetsuya Mori
Hide Tanaka Tetsu
Ichi Hirose
Hide Tanaka Tetsu
Ichi Hirose