HackerTube / Video
uBeam.flv
Phạm Quốc Thiện
A two-minute 2011 clip of an early uBeam wireless power demo. It shows a short-range ultrasound charging demonstration.
Cited mainly as a baseline showing uBeam had made little visible progress and as an example of a demo skeptics found unconvincing.
4 Hacker News mentions · 2014–2017