Big Tech winning battle with 'patent trolls'

By Andrew Chung and Dan Levine (Reuters) - For two decades, companies that buy software patents to sue technology giants have been the scourge of Silicon Valley. Reviled as patent trolls, they have attacked everything from Google's online ads to Apple's iPhone features, sometimes winning hundreds of millions of dollars. But now the trolls are in retreat from the tech titans, interviews and data reviewed by Reuters show. In the wake of several changes in U.S. ...

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