Document Type and Number:
Japanese Patent JPS5550821
Kind Code:
Y2
Application Number:
JP16904775U
Publication Date:
November 27, 1980
Filing Date:
December 15, 1975
Export Citation:
International Classes:
G11B15/093; G11B15/02; G11B15/22; G11B15/43; (IPC1-7): G11B15/02; G11B15/43