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2865987
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Information
Patent Grant
2865987
References
Source
Patent Number
2,865,987
Date Filed
Not available
Date Issued
Tuesday, December 23, 1958
65 years ago
CPC
H04N5/60 - for the sound signals
H03B5/10 - active element in amplifier being vacuum tube
H03B21/01 - by beating unmodulated signals of different frequencies
H03D7/10 - the signals to be mixed being applied between different pairs of electrodes
H04B1/26 - for superheterodyne receivers
US Classifications
348 - Television
455 - Telecommunications
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