MASHABLE - Apr 29 - Yahoo is adding two more patent-infringement claims to the 10 it filed for back in March. Yahoo specifically calls out Facebook for using recently acquired patents as the basis of its lawsuit — even though some of the patents in Yahoo’s claim were acquired as well. A quick recap: Shortly after appointing former PayPal executive Scott Thompson as CEO, Yahoo warned Facebook that the social network was infringing on its intellectual property, specifically 10 patents that relate to Internet technologies. It then went ahead and sued Facebook a few weeks later. Facebook, rather than try to end the suit with a quick settlement, set out to arm itself for a retaliatory strike. Facebook quickly acquired many patents from both IBM and Microsoft. Facebook also countersued Yahoo — saying that it, too, was guilty of patent infringement.
by Peter Pachal
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