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Rockstar — a consortium of companies including Apple, Microsoft, BlackBerry and Sony that purchased 4,000 patents from Nortel in 2011 — is looking to sell a portion of its newly acquired patent portfolio, according to Bloomberg. It has already sold a portion of its patents to Spherix Inc., an intellectual property company. The Nortel patents were highly sought after in 2011, with Apple, Google, Microsoft and other large tech companies vying for them. Rockstar was formed by Microsoft and Apple to team up against Google, which bid $3.14159 billion but eventually lost to Rockstar’s $4.5 billion bid. Sony, BlackBerry and Ericsson also joined the Rockstar group. Now these patents are looking less valuable. Rockstar has been unable to secure key licensing deals with its