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350299
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Information
Patent Grant
350299
References
Source
Patent Number
350,299
Date Filed
Not available
Date Issued
Tuesday, October 5, 1886
137 years ago
CPC
H04J7/02 - in which the polarity of the amplitude is characteristic
H04L1/1664 - the supervisory signal being transmitted together with payload signals; piggybacking
US Classifications
370 - Multiplex communications
310 - Electrical generator or motor structure
381 - Electrical audio signal processing systems and devices
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