Document Type and Number:
Japanese Patent JPH028991
Kind Code:
B2
Inventors:
IMAIZUMI KATSUYOSHI
Application Number:
JP4972581A
Publication Date:
February 28, 1990
Filing Date:
April 01, 1981
Export Citation:
Assignee:
KYOWA GIKEN
International Classes:
C04B28/08; B28B5/00; C04B28/04; C04B28/14
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