Document Type and Number:
Japanese Patent JPS5425839
Kind Code:
U
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Application Number:
JP9802677U
Publication Date:
February 20, 1979
Filing Date:
July 22, 1977
Export Citation:
International Classes:
G03B7/00; G03B7/26; G03B9/08; (IPC1-7): G03B7/00; G03B7/08; G03B9/08