This really does have a stench of scam and a whiff of foolish VC on it.  But just like cold fusion you hope deep down that it might be possible.<p>I took a look at the patents which are easily found by searching on google patents for ubeam as assignee and there just wasn&#x27;t that much disclosed.  Sort of vague references to steering a beam.  It did not appear to be enough to &#x27;enable one skilled in the art to practice the invention.&#x27;<p><a href="http:&#x2F;&#x2F;www.google.com&#x2F;patents&#x2F;US20150214764" rel="nofollow">http:&#x2F;&#x2F;www.google.com&#x2F;patents&#x2F;US20150214764</a>  (for example)<p>I did notice one thing: mention is made of capactivie micro-machines ultrasonic transducers <a href="https:&#x2F;&#x2F;en.wikipedia.org&#x2F;wiki&#x2F;Capacitive_micromachined_ultrasonic_transducers" rel="nofollow">https:&#x2F;&#x2F;en.wikipedia.org&#x2F;wiki&#x2F;Capacitive_micromachined_ultra...</a> which seem to be in the same family as the micromachined mirror arrays commonly used in DLP projectors.  My only experience with ultrasonic is with piezo.<p>One thing that I learned back then was that ultrasonics -bounce-.  Aiming would be really, really hard.  Not to mention that one thing people worry about in this field of steered array ultrasonics is &#x27;necrosis&#x27; (which I don&#x27;t like the sound of).  Turns out that people use high powered steered beams to peer into peoples&#x27; skulls and to do things to the grey matter:<p><a href="http:&#x2F;&#x2F;www.ncbi.nlm.nih.gov&#x2F;pmc&#x2F;articles&#x2F;PMC3002099&#x2F;" rel="nofollow">http:&#x2F;&#x2F;www.ncbi.nlm.nih.gov&#x2F;pmc&#x2F;articles&#x2F;PMC3002099&#x2F;</a><p>Even assuming arguendo that it would be possible to transmit measurable power via a steered ultrasonic beam, I certainly don&#x27;t want to do it anywhere near my head!