Title:
【発明の名称】地中穴掘削装置
Document Type and Number:
Japanese Patent JP2689240
Kind Code:
B2
More Like This:
Inventors:
Sugawara Tadayoshi
Application Number:
JP29560488A
Publication Date:
December 10, 1997
Filing Date:
November 21, 1988
Export Citation:
Assignee:
Ishioka Construction Co., Ltd.
International Classes:
E21B10/32; E21B4/10; E21B6/00; E21B6/02; E21B7/00; (IPC1-7): E21B4/10; E21B6/00
Attorney, Agent or Firm:
Hideo Fujimoto