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Patent Searching and Data


Document Type and Number:
Japanese Patent JPS4880290
Kind Code:
A
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Application Number:
JP1040672A
Publication Date:
October 27, 1973
Filing Date:
January 28, 1972
Export Citation:
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International Classes:
H04R17/00; H01L41/00; H01L41/09; H01L41/02; (IPC1-7): H01L41/02



 
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