Posted on May 27, 2014 by WillemTuesday/ cool inventions Check out these cool inventions I found in recent issues of Bloomberg Businessweek. Check out this nifty little wireless ‘robotic’ printer. Spring for this DIY air filter by Gus Tate if you live in Beijing or Shanghai .. about $35 vs. an expensive $800 installation. It is equally effective at improving indoor air quality ! Here’s inventor Frank Wang’s easy-as-pie-to-use-out-of-the-box drone, the Phantom 2 Vision +. Buy it on Amazon or at Best Buy for about $1,400. (Be careful where you fly it! Don’t get it shot down!).