MICROSOFT
'(<a href="http://www.j-archive.com/media/2009-10-06_DJ_22.wmv">Sarah of the Clue Crew uses her fingers to move some virtual documents around on a large tabletop flat screen monitor.</a>)  Technology that allows a computer to recognize the position & motion of my hands brought Microsoft its 10,000th one of these from the government in 2009'
a patent