Document Type and Number:
Japanese Patent JPH03121563
Kind Code:
U
Application Number:
JP2629090U
Publication Date:
December 12, 1991
Filing Date:
March 15, 1990
Export Citation:
International Classes:
G11B23/42; G11B15/02; G11B20/18; (IPC1-7): G11B20/18; G11B15/02; G11B23/42