Document Type and Number:
Japanese Patent JPS4815048
Kind Code:
Y1
Application Number:
JP1132169U
Publication Date:
April 25, 1973
Filing Date:
February 12, 1969
Export Citation:
International Classes:
G03D15/00; G03B31/00; G11B5/84; G11B5/842; (IPC1-7): G03B31/00; G11B5/84; G11B23/46