According to a Dolby press release "...RIM infringes Dolby patents covering highly efficient digital audio compression technologies which allow manufacturers and consumers to provide and enjoy high quality audio while using extremely limited amounts of transmission and/or storage space for such audio. RIM employs Dolby’s patented technologies in its Blackberry smart phones and Playbook tablet devices, without having obtained licenses from Dolby ....[a]ll other major smart phone makers have agreed to license the Dolby technologies which are the subject of this litigation." The lawsuit was filed on June 14, 2011 in the U.S. District Court for the Northern District of California. Sullivan & Cromwell LLP is counsel for Dolby