ArticleTitled "Sony leads virtual reality patent race"Hypergrid business website has the above referenced article dated May 13/2015 regarding patents being filed for the "Virtual reality" sector. The link is "https://www.hypergridbusiness.com/2015/05/sony-leads-virtual-reality-patent-race/" This sector now has over 12,000 patents filed , with 2,526 being filed last year compared to only 563 patents in 2010. The top 15 patent holding companies account for approx. 22% of the patents and are mainly hardware companies. GLTA.