Document Type and Number:
Japanese Patent JPH0121552
Kind Code:
B2
Inventors:
HIRANO HIROYUKI
Application Number:
JP690481A
Publication Date:
April 21, 1989
Filing Date:
January 19, 1981
Export Citation:
Assignee:
PIONEER ELECTRONIC CORP
International Classes:
G11B21/10; G11B7/085; G11B7/09
Next Patent: JPH0121553