Title:
【考案の名称】油圧クローラドリル
Document Type and Number:
Japanese Patent JPH0619670
Kind Code:
Y2
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Inventors:
Yoshihiro Kaneko
Application Number:
JP5932688U
Publication Date:
May 25, 1994
Filing Date:
May 06, 1988
Export Citation:
Assignee:
Mitsui Shipbuilding Co., Ltd.
International Classes:
E21B1/00; E21B1/26; (IPC1-7): E21C3/20
Domestic Patent References:
| JP5646095A |
Attorney, Agent or Firm:
Shinichi Ogawa (2 outside)