Document Type and Number:
Japanese Patent JPS5516256
Kind Code:
Y2
Application Number:
JP15289474U
Publication Date:
April 16, 1980
Filing Date:
December 17, 1974
Export Citation:
International Classes:
G03B21/11; G03B21/28; G03B23/02; G03B27/32; G03G15/22; G06K21/00; (IPC1-7): G03B21/11; G03B21/28; G03B27/32