U.S. federal trademark · Serial No. 74348363 · Reg. No. TMA421968
digital fibre optic transmission and telecommunications system for the transmission of voice and data; namely, a multiplexer and fibre optic transceiver; a fault signal detector and signal generator for use on fibre optic lines to isolate a power grid fault condition and to monitor and provide data and control signals to an operation control center indicative of status conditions
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