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The Wall Street Journal: Apple says Qualcomm’s business model violates patent law

Apple Inc. broadened its legal offensive against Qualcomm Inc. on Tuesday, arguing in a court filing that some of the chip supplier’s patents were invalid and that its business model violates patent law.

The filing, to a federal court in the Southern District of California, comes about five months after Apple’s opening salvo against Qualcomm, claiming the chip company demanded unfair terms for the use of its technology.

Qualcomm QCOM, -1.42% , whose chips and patents are widely used in smartphones, has accused Apple AAPL, -0.91% of mischaracterizing its business and has sued four of Apple’s contract manufacturers for withholding royalty payments on Qualcomm technology used in iPhones and iPads.

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