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Patent Searching and Data


Document Type and Number:
Japanese Patent JPS55143549
Kind Code:
U
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Application Number:
JP4386679U
Publication Date:
October 15, 1980
Filing Date:
April 03, 1979
Export Citation:
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International Classes:
H04R31/00; G01N19/04; (IPC1-7): G01N19/04; H04R31/00



 
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