U.S. federal trademark · Serial No. 73154500 · Reg. No. 1159756
Single-Channel Telephone Carrier System Comprising a Central Office Module, a Subscriber Module and an Isolation Filter for Providing a Second One-Party Carrier Derived Subscriber Circuit on an Existing Cable Pair Servicing a Non-Carrier Derived Subscriber Circuit
Source: USPTO federal trademark records. Informational only, not legal advice. Status and details may lag the live USPTO database.