Apple has widened its legal battle against Qualcomm and the US chip maker has accused it of claiming invalid patents at the last sweep of the conflict between the two technology giants.

According to the details published by the Wall Street Journal, yesterday in a federal court filing in California, Apple claimed that a number of Qualcomm patents were invalid because they conflicted with existing patents, and that other patents were not required for mobile phone communication.

In January, the iPhone manufacturer filed a lawsuit complaining that Qualcomm, which produces chips commonly used in smartphones and tablets around the world, is abusing market power to claim unfair royalties and claiming billions of dollars in compensation.

Apple later opened two similar complaints against Qualcomm in China.

In April Qualcomm said that Apple violated Qualcomm’s agreements and encouraged regulatory offenses.

“Qualcomm’s illegal commercial practices are damaging to Apple and the entire industry,” Apple said Tuesday in an e-mail to the AFP.

“They supply us with a single connectivity component, but for years they’ve been demanding a percentage of the total cost of our products – effectively hurting Apple’s innovation.”

Qualcomm rejected the charges in a statement by legal adviser Don Rosenberg.

Rosenberg said Apple knows well that “Qualcomm’s innovations are at the heart of every iPhone, and that these devices provide the most important uses and features.”

“It’s just not right that Qualcomm seeks to collect royalties for Apple’s innovations that have nothing to do with Qualcomm’s technology.”

In January, the US Federal Trade Commission went to Qualcomm with an antitrust case that allegedly misuses the dominant market position for traders, resulting in higher prices for the consumer.

The complaint stating that Qualcomm’s practices “mean that the monopoly is illegally maintained on” baseband processors, “which are devices that provide cellular communications over phones and other products.” Qualcomm rejected claims as “flawed.”

In 2015, the group in San Diego, California, agreed to pay $ 975 million for antitrust charges in China.

Qualcomm challenges the request for a tender in the European Union, which can lead to a fine of up to 10 percent of its annual sales, which in 2015 amounted to 26.5 billion dollars.

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