Document Type and Number:
Japanese Patent JPS5047441
Kind Code:
U
Application Number:
JP10071973U
Publication Date:
May 12, 1975
Filing Date:
August 28, 1973
Export Citation:
International Classes:
G09B5/02; G03B21/00; G03B21/132; G08B3/00; G08B21/00; (IPC1-7): G03B21/00; G08B3/00