Qualc-omm has moved on the offensive in its legal battle with Apple with a countersuit claiming the iPhone maker breached agreements and encouraged regulatory attacks world-wide on the US computer chipmaker. In a legal filing late Monday, Qualcomm denied the charges made by Apple in its January lawsuit, while accusing Apple of failing to negotiate in good faith on patent royalties.

Apple's complaint argued that Qualcomm abused its market power to demand unfair royalties, echoing charges by US antitrust regulators and authorities around the world. But Qualcomm responded that Apple was abusing its position in the smartphone market to reduce the royalties it pays for technologies contributing to the success of the iPhone.

Copyright Agence France-Presse, 2017