Document Type and Number:
Japanese Patent JPH0210766
Kind Code:
B2
Inventors:
EGAWA HIROAKI
Application Number:
JP3065981A
Publication Date:
March 09, 1990
Filing Date:
March 04, 1981
Export Citation:
Assignee:
EGAWA HIROAKI
International Classes:
C01G28/00; B01J45/00; C02F1/42
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