U.S. federal trademark · Serial No. 74069616
modular back-up battery unit and circuitry for charging the back-up batteries from an external power supply and for switching to back-up battery in the event of a failure or drop in the external power supply and to convert the battery voltage and the external voltage to other forms
Source: USPTO federal trademark records. Informational only, not legal advice. Status and details may lag the live USPTO database.