The National Development and Reform Commission (NDRC) on Monday released the evidence it used against US mobile phone chip maker Qualcomm Inc in the record antitrust fine announced last month.

Data showed that Qualcomm had absolute dominance in the licensing of some patents in wireless communication and it had misused its market position by charging an unfairly high patent fee, the NDRC said in a document posted on its website.

Qualcomm was fined 6.09 billion yuan ($975 million) by the NDRC in February.