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3048660
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Information
Patent Grant
3048660
References
Source
Patent Number
3,048,660
Date Filed
Not available
Date Issued
Tuesday, August 7, 1962
63 years ago
CPC
H04Q1/4465 - the same frequency being used for all signalling information
H04M17/023 - Circuit arrangements
US Classifications
379 - Telephonic communications
194 - Check-actuated control mechanisms
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