Document Type and Number:
Japanese Patent JPS56103922
Kind Code:
U
Application Number:
JP18393579U
Publication Date:
August 14, 1981
Filing Date:
December 28, 1979
Export Citation:
International Classes:
G11B20/04; G11B5/027; G11B15/10; (IPC1-7): G11B5/033; G11B15/10