U.S. federal trademark · Serial No. 75185020
digital signal processor chip, controller and custom circuitry used to reduce noise and static caused by electrical interference and environmental noise in speech signals in telephone networks and radio transmissions that are output to a transducer used in radios, telephones, headsets and teleconferencing networks
Source: USPTO federal trademark records. Informational only, not legal advice. Status and details may lag the live USPTO database.