Universal connector for rechargeable and non-rechargeable...

Universal electric vehicle charging adapter

Universal electrical energy saver

Universal harmonic mitigating system

Universal power inlet system for power distribution units

Universal power supply

Universal power tool battery pack coupled to a portable...

Universal serial bus charger for a mobile device

Universally interchangeable and modular power supply with...

Usage counter for portable jump-starting battery unit

Using dc transmission system for improving ac transmission...

Utility grid stabilization apparatus and method, as well as...

Utility metering

Utility-interactive inverter system architecture and method...

Vanadium redox battery energy storage and power generation...

Var generator having controlled discharge of thyristor...

Variable frequency power source operating system

Variable frequency power unit controlling system

Variable inductance current limiting reactor control system...

Variable reluctance electric motor systems