Yahoo! Sues Facebook Alleging Patent Infringement - CourtSide
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Yahoo! Sues Facebook Alleging Patent Infringement

Yahoo! has filed a patent infringement lawsuit alleging that Facebook violated several of Yahoo!'s patents related to online communications and social networking.  The filing claims that "Facebook's entire social network model...is based on Yahoo!'s patented social networking technology."  The complaint requests triple damages and an injunction preventing Facebook from continuing to use the patents in question.