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Patent Searching and Data


Document Type and Number:
Japanese Patent JPS6346840
Kind Code:
B2
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Inventors:
OOSHIKA HARUO
SATO TADASHI
Application Number:
JP574782A
Publication Date:
September 19, 1988
Filing Date:
January 18, 1982
Export Citation:
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Assignee:
KOKEN KOGYO KK
International Classes:
E21B6/02; E21B6/00



 
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