Title:
【発明の名称】掘削装置
Document Type and Number:
Japanese Patent JP3452084
Kind Code:
B2
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Inventors:
Fujii
Application Number:
JP10385394A
Publication Date:
September 29, 2003
Filing Date:
May 18, 1994
Export Citation:
Assignee:
Japan Basic Technology Co., Ltd.
International Classes:
E21B11/00; E21B3/02; E21B7/20; (IPC1-7): E21B11/00; E21B3/02; E21B7/20
Domestic Patent References:
| JP63126489U | ||||
| JP49436U |
Attorney, Agent or Firm:
Furuya Fumio (1 person outside)