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2139731
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Patent Grant
2139731
References
Source
Patent Number
2,139,731
Date Filed
Not available
Date Issued
Tuesday, December 13, 1938
85 years ago
CPC
H01L21/108 - Provision of discrete insulating layers
H01L21/103 - Conversion of the selenium or tellurium to the conductive state
US Classifications
257 - Active solid-state devices
252 - Compositions
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