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uBeam finally shows off its wireless charging tech

uBeam is one of tech's most intriguing startups, promising to someday charge your wireless devices through the air (or, to be more technical, ultrasonic waves). It's also controversial, with some having publicly suggested that uBeam's technology defies the laws of physics.

So there was a lot of anticipation yesterday when company founder and CEO Meredith Perry appeared at the Upfront Summit in Los Angeles, for the first-ever demo of uBeam's technology.

The demo: Perry first stood a couple of yards from a large white box emitting ultrasound waves, and used a device that glowed red when it was in the waves' path. She then grabbed an Android smartphone in a large and bulky black case, and held it up in that path. When she did so, a large battery charge counter on the screen showed that it was indeed charging.