Document Type and Number:
Japanese Patent JPS563704
Kind Code:
Y2
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Application Number:
JP519975U
Publication Date:
January 27, 1981
Filing Date:
January 09, 1975
Export Citation:
International Classes:
G03B31/00; G03B31/02; G11B15/02; G11B15/60; (IPC1-7): G03B31/02
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