Apple Steps Up Legal Battle With Qualcomm

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Apple highlights the recent Supreme Court ruling surrounding Lexmark's printer cartridge patents, in which the court decided that Lexmark couldn't sue for patent infringement after it sold a toner cartridge to a retail buyer because its patent rights had been exhausted with the sale.

Apple's 160-page filing largely centers on a Supreme Court ruling on patents from last month.

Apple is also asking the court to stop lawsuits against its four iPhone manufacturers, saying that the dispute is purely between Apple and Qualcomm.

The legal battle centers around Apple's obligation to pay Qualcomm royalties for each wireless device that contains the company's chip technology. Apple is intensifying its legal battle with Qualcomm over the technology in iPhones and iPads as Apple seeks to void some of the chip maker's patent claims and licensing agreements.

Apple (NASDAQ:AAPL) wants a court to rule Qualcomm's (NASDAQ:QCOM) royalty license agreements invalid, according to Reuters.

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Qualcomm has said its patents that cover key cellular communications technology are essential to smartphones and that the iPhone wouldn't exist without Qualcomm developing those technologies and agreeing to license them.

Further, the brief read that Apple has "continuing - and mounting - evidence of Qualcomm's perpetuation of an illegal business model that burdens innovation". However, the company is now less dependent on Qualcomm because Intel makes similar chips.

In that case the court found that patent law can not be used to prevent the resale of Lexmark printer cartridges refilled with toner by other suppliers.

In the claim, Apple called the invalid royalties "double-dipping" and demanded restitution for all the excess it had to pay. If the court rules in Apple's favor, Qualcomm's business model will take a serious hit.