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Patent Searching and Data


Document Type and Number:
Japanese Patent JPS57202297
Kind Code:
U
Application Number:
JP9055181U
Publication Date:
December 23, 1982
Filing Date:
June 19, 1981
Export Citation:
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International Classes:
G10K9/13; G04C21/02; G04C21/34; H04R1/00; H04R11/00; H04R13/00; (IPC1-7): H04R13/00; G04C21/34; G10K9/13; H04R1/00; H04R11/00



 
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