Document Type and Number:
Japanese Patent JPS5628589
Kind Code:
Y2
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Application Number:
JP9914476U
Publication Date:
July 07, 1981
Filing Date:
July 24, 1976
Export Citation:
International Classes:
G03B19/18; G03B1/42; G03B1/48; G03B21/32; G03B21/50; G03B23/02; G11B23/00; G11B23/087; (IPC1-7): G03B23/02; G03B1/48; G03B21/32; G03B21/50