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2642493
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Information
Patent Grant
2642493
References
Source
Patent Number
2,642,493
Date Filed
Not available
Date Issued
Tuesday, June 16, 1953
70 years ago
CPC
H04M15/38 - Charging, billing or metering by apparatus other than mechanical step-by-step counter type
H04L5/245 - with a number of discharge tubes or semiconductor elements which successively connect the different channels to the transmission channels
H04Q1/40 - whereby duration of pulse or interval between two pulses is variable
US Classifications
178 - Telegraphy
370 - Multiplex communications
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