Document Type and Number:
Japanese Patent JPS5427943
Kind Code:
Y2
Application Number:
JP8050774U
Publication Date:
September 10, 1979
Filing Date:
July 08, 1974
Export Citation:
International Classes:
G03B23/02; G11B23/04; G11B23/08; G11B23/087; (IPC1-7): G11B23/08