P-DUKE

Electric converters, filters used for electric appliances; satellite navigation system, namely, a global positioning system GPS, electrical power supplies, directional navigation system, namely, a global positioning system, battery chargers, uninterrupted electrical power supplies, ballasts, automatic voltage regulators, electric motor controllers, AC/DC converters, DC/DC converters, voltage regulators, thermostats, temperature controllers, [ electric relays, ] rectifiers, electrical transformers, [ telephones, ] electric switches, voltage surge suppressors