Facebook  and Microsoft are partnering up  for $550 million patent deal. Earlier this month, Microsoft picked up  almost 1,000 patents from AOL, worth a shade over $1 billion, a deal that Facebook was also vying for . Microsoft is now selling a portion of that portfolio to Facebook (650 patents), the Redmond firm confirms , as Facebook preps for a pitched patent fight with Yahoo. Facebook will license the remaining patents Microsoft still owns. Let's not forget, late in March, Facebook bought  about 750 patents from IBM. It's been a busy month for Facebook as it gears up for its May IPO, and also an expensive one too--together with its early April Instagram purchase, Facebook's spent $1.55 billion so far.
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