Apple wins DRM patent case against ContentGuard

A U.S. district court judge has ruled Apple’s method of distributing and authenticating content doesn’t infringe on DRM patents owned by ContentGuard Holdings, Reuters reports. ContentGuard sued in 2013, claiming Apple applied five of its DRM patents in iTunes and iBooks to dispense movies, songs, shows and books that could be restricted to function only for approved users. Apple denied infringing on the patents and went even further by claiming the patents themselves were invalid. A jury didn’t buy Apple’s argument that the patents were invalid, but also didn’t find enough proof that Apple had infringed the patents, so no damages were awarded to ContentGuard. An attorney for ContentGuard expressed his disappointment in the ruling and said he and his clients were evaluating their options. Apple declined to comment.

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