Document Type and Number:
Japanese Patent JPS5026419
Kind Code:
Y1
Application Number:
JP7354570U
Publication Date:
August 07, 1975
Filing Date:
July 24, 1970
Export Citation:
International Classes:
G09B7/07; G06Q50/00; G06Q50/10; G06Q50/20; G09B7/06; (IPC1-7): G09B7/06; G06F15/20