This week in pictures: The SOPA saga

Also: Barnes & Noble fights back against Microsoft patent claims; Buffett bets big on IBM; Google serves up Android 4.0 source code; Amazon ships Kindle Fire; and Nintendo builds life-size Mario Karts

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Barnes & Noble pummels Microsoft patents with prior art
Barnes & Noble has fired another broadside against Microsoft in its defense of accusations that the retail bookseller violates Microsoft patents in its Nook eReader device. According to legal observer site Groklaw, Barnes & Noble has filed a supplemental notice of prior art that contains a 43-page list of examples Barnes & Noble believes counters Microsoft's claim that Nook violates five of Microsoft's patents.

Related reading: Barnes and Noble reveals Microsoft's cheesy legal tricks against Android

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