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Patent Searching and Data


Document Type and Number:
Japanese Patent JPS4874034
Kind Code:
U
Application Number:
JP12080271U
Publication Date:
September 14, 1973
Filing Date:
December 20, 1971
Export Citation:
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International Classes:
H04R1/02; H04N5/64; (IPC1-7): H04R1/02; H04N5/64



 
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