Document Type and Number:
Japanese Patent JPS57122043
Kind Code:
U
Application Number:
JP750881U
Publication Date:
July 29, 1982
Filing Date:
January 23, 1981
Export Citation:
International Classes:
G11B15/087; G11B15/02; G11B15/10; (IPC1-7): G11B15/10; G11B15/02