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Document Type and Number:
Japanese Patent JPH0470259
Kind Code:
B2
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Inventors:
SAKAMOTO MITSUHISA
KATAYAMA NAOTAKE
Application Number:
JP10829484A
Publication Date:
November 10, 1992
Filing Date:
May 30, 1984
Export Citation:
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Assignee:
TOSOH CORP
International Classes:
C04B35/48; C01G25/02



 
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