U.S. federal trademark · Serial No. 75044187 · Reg. No. 2078675
repeaterless basic rate ISDN local loop extenders, namely, a range-extending two-wire to four-wire inversion unit, which allows transportation of basic rate ISDN using dual-loop, half-rate and full-rate technology
Source: USPTO federal trademark records. Informational only, not legal advice. Status and details may lag the live USPTO database.