Document Type and Number:
Japanese Patent JPS4916145
Kind Code:
Y1
Application Number:
JP2913068U
Publication Date:
April 23, 1974
Filing Date:
April 11, 1968
Export Citation:
International Classes:
G03B31/00; G11B5/00; G11B25/10; (IPC1-7): G11B25/10; G03B31/00