2011-08-04 MPEG LA: 12 companies own patents essential to Google's VP8 codec (ars technica) http://lwn.net/Articles/453510/ http://arstechnica.com/web/news/2011/07/mpeg-la-12-companies-own-patents-essential-to-googles-vp8-codec.ars WEBMに必要な特許を保持しているとMPEG LA参加の12社が主張。