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Patent Searching and Data


Document Type and Number:
Japanese Patent JPS57198770
Kind Code:
U
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Application Number:
JP8762681U
Publication Date:
December 17, 1982
Filing Date:
June 15, 1981
Export Citation:
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International Classes:
G11B23/00; G11B15/64; G11B15/66; G11B15/67; G11B23/107; (IPC1-7): G11B15/64; G11B15/66