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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.

The product: Perry says that the ultimate phone case will be much sleeker than what she showed, while a mock-up of the transmitter kind of looks like a very small satellite dish designed by Apple or Nest. There was no timeline for commercialization.

There are videos of the demo floating around Twitter for those interested (it was supposed to be off the record, but social media ultimately made that untenable). Axios was unable to visit uBeam's Santa Monica headquarters following the conference due to the company's schedule.

Next: While it appears the basic science of uBeam's plan does check out, there still remain questions. For one, the company has yet to squeeze its technology into the beautiful disc-shaped device that it plans to sell consumers. Nor the quasi-ceiling panels it would sell to commercial customers like coffee shops. Perry said that the company has recently shrunken its tech into coin-sized chips, a first step in the process.

We also don't know the ultimate distance at which consumers would be able to charge devices, the strength of charge or if there are limitations on type of device (we're told Perry picked that particular Android for the demo because of its highly-visible charging icon).

In short: This is a science project that is clearly progressing, but not nearly finished yet.

Go deeper

Behind GameStop's latest stock surge

Illustration: Aïda Amer/Axios

Back in focus: The meme stock trade.

By the numbers: GameStop finished up 19%, after a wild day that saw shares spike as much as 80%.

AT&T spins off U.S. video business via deal with TPG

Photo: AaronP/Bauer-Griffin/GC Images

AT&T is spinning off three of its video services, including its satellite TV brand DirecTV, to create a new standalone video company called New DIRECTV.

Details: The company will be jointly owned by AT&T and private-equity giant TPG. AT&T will retain a 70% stake and TPG will own 30% of the firm.

Updated 2 hours ago - Sports

Ex-USA Gymnastics coach dies by suicide after being charged with human trafficking

John Geddert. Photo: AFP via Getty Images

The body of John Geddert was found on Thursday, just hours after the former USA Gymnastics coach was charged with 24 counts of criminal misconduct, according to Michigan Attorney General Dana Nessel.

What they're saying: “My office has been notified that the body of John Geddert was found late this afternoon after taking his own life. This is a tragic end to a tragic story for everyone involved," Nessel said in a statement.