Washington — Apple said in a legal filing that there was "mounting evidence" Qualcomm was operating an "illegal business model" designed to extract high patent royalties on every wireless device sold. The iPhone maker said it was adding more allegations to a complaint filed in January that accuses Qualcomm of trying to monopolise the chip market for wireless devices. The new claims, provided to Bloomberg News and scheduled to be filed on Tuesday in federal court in San Diego, add to what was already an ugly fight between two of the most profitable technology companies. Apple found "continuing — and mounting — evidence of Qualcomm’s perpetuation of an illegal business model that burdens innovation", according to the filing. It claims some of the patents that Qualcomm wants to get paid for are invalid and that Qualcomm has not fulfilled its obligation to charge fair and reasonable rates on patents related to industry standards. The amended lawsuit highlights a May US Supreme Court rul...

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