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Patent Searching and Data


Document Type and Number:
Japanese Patent JPH0441752
Kind Code:
B2
Inventors:
IIDA TAKEO
AIHARA YOSHIHIRO
Application Number:
JP20583086A
Publication Date:
July 09, 1992
Filing Date:
September 03, 1986
Export Citation:
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Assignee:
HITACHI CONSTRUCTION MACHINERY
International Classes:
E21B3/00; E21B3/035; E21B7/04



 
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