49 karma · joined March 17, 2016
Dang, please merge with thcz.
https://patents.google.com/patent/US20160021148A1 (see the "grant" status line)
I think it should not have been granted there being prior art, but for it to be turned over, I think it would have to be challenged in court. That's my limited understanding as a non-US person without any experience with patents whatsoever.
I am also surprised to see @nilknarf has done that in 2014! (As per their comment.) Don't know how I didn't come across his post during my research into this, but checking it now, someone in the comments posted a link to a patent which captures this idea.
http://www.freepatentsonline.com/20160021148.pdf
The patent must be invalid, because it's from 2016 and there is clearly prior art, but it kind of sucks, because it basically means polishing something like e.g. @phiresky has done with the remote pen just means if you succeed in bringing down the time to connect and make it something usable enough for users, you're opening yourself up to a claim if you decide to package it up into an app.