US state attorneys general are taking aim at patent trolls. One has passed legislation to curb abusive demand letters and another has announced a settlement with a notorious troll. But limitations exist to how much can be achieved at state level, as well as concerns about confusion and overreach, reports Michael Loney
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Rebecca Newman at Addleshaw Goddard, who live-reported on the seminal dispute, unpicks the trials and tribulations of the case and considers its impact