Document Type and Number:
Japanese Patent JPS57122041
Kind Code:
U
Application Number:
JP720981U
Publication Date:
July 29, 1982
Filing Date:
January 20, 1981
Export Citation:
International Classes:
G11B15/07; G11B15/04; G11B15/66; G11B15/675; (IPC1-7): G11B15/04; G11B15/66