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Patent Searching and Data


Document Type and Number:
Japanese Patent JPS5423720
Kind Code:
U
Application Number:
JP9687077U
Publication Date:
February 16, 1979
Filing Date:
July 19, 1977
Export Citation:
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International Classes:
G11B33/12; H04R1/02; (IPC1-7): H04R1/02; G11B1/00