Title:
掘削装置
Document Type and Number:
Japanese Patent JP6403652
Kind Code:
B2
Inventors:
Takahiko Kashimoto
Application Number:
JP2015206554A
Publication Date:
October 10, 2018
Filing Date:
October 20, 2015
Export Citation:
Assignee:
Oak corporation
International Classes:
E21B17/02; E02D5/34; E21B4/14; E21B17/18; E21B17/22
Domestic Patent References:
| JP6088472A | ||||
| JP57031389U | ||||
| JP57178087A | ||||
| JP9195656A | ||||
| JP52121101U | ||||
| JP57178084A |
Foreign References:
| US20130180707 |
Attorney, Agent or Firm:
Hiroshi Masaki
Yuko Mikami
Tadashi Fujikawa
Yuko Mikami
Tadashi Fujikawa