Title:
【考案の名称】掘削装置
Document Type and Number:
Japanese Patent JP3047372
Kind Code:
U
Inventors:
Katsuhiko Nakamura
Application Number:
JP893797U
Publication Date:
April 10, 1998
Filing Date:
September 22, 1997
Export Citation:
Assignee:
Shuei Industry Co., Ltd.
International Classes:
(IPC1-7): E21B4/06
Attorney, Agent or Firm:
Yoshiaki Satake