Law360, New York (March 01, 2012, 3:43 PM ET) -- VoltStar Technologies Inc. lodged a patent infringement suit against AT&T Inc. in Texas federal court Wednesday, accusing the telecommunications giant of copying its design for energy-efficient cellphone chargers.
VoltStar says AT&T's Zero brand of phone chargers stole the company's patented idea for chargers that eliminate so-called vampire load, the wasteful use of power by an inactive electrical device.
Normal phone chargers draw a small amount of energy from an electrical socket even when not plugged into a phone, but unlike alarm clocks and other devices that...
AT&T Zapped With Suit Over Phone Charger Patent
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