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Title:
DRILLING APPARATUS FOR PLACE IMPACT STAKE
Document Type and Number:
Japanese Patent JPS58164890
Kind Code:
A
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Inventors:
NAKAMURA SHIGERU
Application Number:
JP4805082A
Publication Date:
September 29, 1983
Filing Date:
March 25, 1982
Export Citation:
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Assignee:
KOORITSU ENJINIYARINGU KK
International Classes:
E21B11/00; E21B11/04; (IPC1-7): E21B11/04
Domestic Patent References:
JPS5045406A1975-04-23
JPS551414A1980-01-08
Attorney, Agent or Firm:
Ariga Gunichiro



 
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