(ATTN: ADDS FTC official's remarks, details in last 4 paras)
SEOUL, Dec. 4 (Yonhap) -- A Seoul court ruled in favor of South Korea's antitrust regulator Wednesday, saying its decision to impose a record fine on U.S. chipmaker Qualcomm Inc. was justifiable.
The ruling would be a setback for Qualcomm, which appealed the Fair Trade Commission (FTC)'s 2016 decision to fine the company 1.03 trillion won (US$865 million) for abusing its dominant position in mobile communication markets.
Calling the FTC ruling "unprecedented and insupportable," Qualcomm took the case to the Seoul High Court in February 2017.
In December 2016, the FTC said the San Diego-based company and its two affiliates breached South Korea's competition law by refusing to offer licenses to chipset manufacturers and demanding high fees for patents used by smartphone makers.
The watchdog also issued a corrective order for the U.S. company not to sign unfavorable terms with customers.
After three years of proceedings, the local court judged that most of the FTC's corrective order was legitimate.
The ruling may affect Qualcomm's patent-related profit in South Korea, home to global mobile phone producers, including Samsung Electronics Co.
In response to the court's decision, an FTC official said the ruling is "meaningful" because it acknowledged that Qualcomm's patent-license business model was unfair.
Qualcomm holds a majority share of standard essential patent rights in the code division multiple access (CDMA) and the long-term evolution (LTE) standards, reportedly posting license royalties in the billions of dollars.
The FTC has said Qualcomm refused to offer its patent rights to chipset makers and forced them to sign unfavorable contracts that demanded they report business information to Qualcomm.
It also did not provide Qualcomm-chartered chipsets to mobile phone makers when they refused to comply with Qualcomm's license policy and demanded the manufacturers share their patent rights for free.