India, March 15 -- Apple Inc. won't have to face billions of dollars in possible damages over Qualcomm Inc.'s allegations the iPhone maker incited an antitrust investigation of the chipmaker's business practices and lied to Korean regulators.

A federal judge in San Diego on Thursday agreed with Apple that there's no evidence the company's cooperation with government investigators violated the terms of an agreement under which Qualcomm had been paying billions of dollars in what Apple says were rebates for patent royalties.

US District Judge Gonzalo Curiel concluded Qualcomm can't receive a refund of the rebates it already paid under a 'truce' with the iPhone maker, which had made it the exclusive supplier of phone chipsets for five year...