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Patent Searching and Data


Document Type and Number:
Japanese Patent JPS4920819
Kind Code:
Y1
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Application Number:
JP9080370U
Publication Date:
June 04, 1974
Filing Date:
September 11, 1970
Export Citation:
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International Classes:
G11B19/27; G11B19/20; (IPC1-7): G11B19/20