Bloomberg News reported on Saturday that Qualcomm had filed a lawsuit in Beijing seeking a ban on the assembly and sale of iPhones in China -- a vital Apple manufacturing base and sales market.

The two California companies are fighting over Apple's claims that Qualcomm is abusing its market power over certain mobile chipsets in order to demand unfair royalties.

Apple filed a US lawsuit to that effect in January and has joined efforts in other countries where Qualcomm faces probes from antitrust authorities.

Qualcomm has countersued Apple for the royalties.

In response to Qualcomm's Beijing suit, Apple said in a statement: "This claim is meritless and, like their other courtroom manoeuvres, we believe this latest legal effort will fail."

Read also: Qualcomm seeks China iPhone ban, expanding Apple legal fight

AFP was not immediately able to obtain a copy of Qualcomm's complaint.

Bloomberg reported it was filed on September 29 in an intellectual-property court, and said the suit was confirmed by a Qualcomm spokeswoman.

It remains unclear how much chance Qualcomm's case has in China, where huge numbers of workers are employed in the manufacture of iPhones.

The Qualcomm patents cover power management and a touch-screen technology called Force Touch that Apple uses in current iPhones, Bloomberg reported, quoting Qualcomm.

Apple dismissed Qualcomm's claims. 

"In our many years of ongoing negotiations with Qualcomm, these patents have never been discussed and in fact were only granted in the last few months," Apple's statement said.

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