by Glenn CHAPMAN SAN FRANCISCO, United States (AFP) — Apple on Friday sued Qualcomm, accusing the California chipmaker of abusing its market power to demand unfair royalties, echoing charges filed days earlier by US antitrust regulators. Tech giant Apple said in the court filing that it has been overcharged “billions of dollars” by its chipmaking partner’s “illegal scheme.” The company also claimed Qualcomm owes it a billion dollars but is refusing to pay in retaliation […]