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Patent Searching and Data


Title:
HORIZONTAL DRILLING METHOD
Document Type and Number:
Japanese Patent JPS559981
Kind Code:
A
Inventors:
NAKAMURA KOUZOU
Application Number:
JP8435378A
Publication Date:
January 24, 1980
Filing Date:
July 10, 1978
Export Citation:
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Assignee:
NAKAMURA KOUZOU
International Classes:
E21B7/04; E21B7/20; E21B7/28; (IPC1-7): E21B7/20; E21B7/28
Domestic Patent References:
JPS5140725A1976-04-05