Dr Dre faces return to court in Beats headphones case

California judge decides a jury should hear the accusations made against the headphones mogul by a former partner

Dr Dre faces the prospect of a gruelling lawsuit after a California appeals court allowed a former hedge fund manager to go ahead with his case against Beats Electronics over royalties for Beats headphones.

Steven Lamar first brought his case two years ago, arguing that he was "the founder of Beats headphones, its design and corporate identity", and that he had done the preparatory work on setting up Beats and demanding a cut of royalties on future sales of headphones derived from the original design, instead of just the 4% he gets on past models.