U.S. federal trademark · Serial No. 74444097 · Reg. No. 1869325
digital and analog telemetry, tone control devices, substation line switches (PABX), energy management devices, protective relaying equipment, and HCB relay interfaces operating over the telephone, microwave and fiber optics
Source: USPTO federal trademark records. Informational only, not legal advice. Status and details may lag the live USPTO database.