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Title:
【発明の名称】掘削土砂圧密形オーガスクリュー
Document Type and Number:
Japanese Patent JP2645979
Kind Code:
B2
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JPS6421196AUGER SCREW
Inventors:
仲山 要
Application Number:
JP9943694A
Publication Date:
August 25, 1997
Filing Date:
May 13, 1994
Export Citation:
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Assignee:
SANTETSUKU KK
International Classes:
E21B17/22; E21B7/00; (IPC1-7): E21B17/22; E21B7/00
Domestic Patent References:
JP6197493U
JP6240487B2
JP444706Y2
Attorney, Agent or Firm:
久保 司