Document Type and Number:
Japanese Patent JPS5022933
Kind Code:
B1
Application Number:
JP8971170A
Publication Date:
August 04, 1975
Filing Date:
October 14, 1970
Export Citation:
International Classes:
G09B7/08; G03B21/00; G03B31/06; G09B7/06; G11B5/00; G11B5/02; (IPC1-7): G09B7/06; G03B21/00; G11B5/02