Document Type and Number:
Japanese Patent JPS5519989
Kind Code:
Y2
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Application Number:
JP15613174U
Publication Date:
May 13, 1980
Filing Date:
December 24, 1974
Export Citation:
International Classes:
G09B15/00; G10B3/00; G10C3/00; G10C3/02; G10H1/00; (IPC1-7): G10C3/00; G09B15/00