Title:
アースドリル
Document Type and Number:
Japanese Patent JP5271788
Kind Code:
B2
Inventors:
Tokuo Murate
Application Number:
JP2009103974A
Publication Date:
August 21, 2013
Filing Date:
April 22, 2009
Export Citation:
Assignee:
Nippon Vehicle Manufacturing Co., Ltd.
International Classes:
E21B17/07; E21B3/00
Domestic Patent References:
| JP60195390U | ||||
| JP59163687U |
Attorney, Agent or Firm:
Patent Service Corporation Shinmei Century
Previous Patent: JPS5271787
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