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Document Type and Number:
Japanese Patent JPS5412830
Kind Code:
B1
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Application Number:
JP9380568A
Publication Date:
May 25, 1979
Filing Date:
December 23, 1968
Export Citation:
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International Classes:
H04Q1/457; G01R23/02; G01R23/15; H04L27/26; H04Q1/45; (IPC1-7): G01R23/02



 
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