Document Type and Number:
Japanese Patent JPS5254347
Kind Code:
Y2
Application Number:
JP12964672U
Publication Date:
December 09, 1977
Filing Date:
November 10, 1972
Export Citation:
International Classes:
G03B21/132; G03B21/00; G09F13/04; G09F19/12; (IPC1-7): G03B21/00; G03B21/132; G09F19/12