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Patent Searching and Data


Document Type and Number:
Japanese Patent JPS57164890
Kind Code:
U
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Application Number:
JP4998081U
Publication Date:
October 18, 1982
Filing Date:
April 07, 1981
Export Citation:
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International Classes:
G11B17/028; G11B17/049; G11B25/04; (IPC1-7): G11B25/04