U.S. federal trademark · Serial No. 73676212 · Reg. No. 1510748
MODEM SHARING DEVICES UNITS FOR INTERFACING WITH MULTIPLE DATA PORTS; AUTOMATIC CALLING UNITS; PROTOCOL CONVERTERS; DUAL-DIAL BACKUP UNITS AND ERROR CONTROLLERS UTILIZED WITH MODEMS; DATA SERVICE UNITS AND CHANNEL SERVICE UNITS UTILIZED IN THE DIGITAL DATA SERVICE NETWORK; MULTIPLE MODEM ENCLOSURES, NAMELY, EQUIPMENT RACKS; LINE DRIVERS; AND MULTIPLEXERS
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