Document Type and Number:
Japanese Patent JPS6352197
Kind Code:
B2
Inventors:
MORYA ISAMU
Application Number:
JP21315984A
Publication Date:
October 18, 1988
Filing Date:
October 11, 1984
Export Citation:
Assignee:
RAITO KOGYO KK
International Classes:
E21B4/00; E21B6/00; E21B6/02