Apple could face hundreds of millions of dollars in additional liability after Taction Technology asked a US federal judge for further damages, interest and ongoing royalties following its landmark $5.7 billion patent infringement verdict against the technology giant.
Taction filed the request in the US District Court for the Southern District of California after its September jury victory over technology used in Apple’s iPhones and Apple Watches.
The jury found that Apple’s Taptic Engine infringed two Taction patents covering haptic feedback technology and awarded the San Diego-based company more than $5.7 billion in damages.
The award, which has not yet been entered as a final judgment, is the largest US patent verdict to date.
Taction is now seeking supplemental damages covering Apple device sales that were not included in the original calculation, as well as prejudgment and post-judgment interest and ongoing royalties on future sales of allegedly infringing products.
The jury award covered relevant Apple sales through March 2026. Taction’s new application seeks additional compensation for subsequent iPhone and Apple Watch sales.
If granted, the request could increase Apple’s potential liability by hundreds of millions of dollars beyond the $5.7 billion jury award.
The latest filing comes as Apple pursues its own attempt to overturn the verdict.
Apple has asked the federal judge overseeing the case to set aside the jury’s decision or grant a new trial. The company argues that Taction failed to provide sufficient evidence to support the damages award and that the jury was left to determine the figure without an adequate evidential basis.
Apple has maintained that its Taptic Engine is fundamentally different from Taction’s technology and that it does not use the company’s patented inventions.
Taction, meanwhile, maintains that the jury correctly found that Apple’s technology infringed its patent rights.
The dispute concerns technology used to generate the tapping and vibration feedback experienced by users of iPhones and Apple Watches.
Taction filed its lawsuit against Apple in 2021, accusing the company of infringing patents covering tactile transducers used to produce haptic feedback.
A federal judge ruled in Apple’s favour in 2023, but the US Court of Appeals for the Federal Circuit later revived the case, allowing Taction’s claims to return to the lower court and proceed to trial.
The jury ruled in Taction’s favour in September 2026, finding infringement and awarding more than $5.7 billion. It did not find that Apple’s infringement was wilful.
The court is now considering competing post-trial requests with substantial financial consequences.
Taction is attempting to increase its potential recovery through supplemental damages, interest and future royalties, while Apple is seeking to eliminate the verdict or secure a new trial.
The proceedings demonstrate how even a multibillion-dollar jury verdict can leave significant legal and financial questions unresolved.
Until the court rules on the competing motions and enters a final judgment, both Apple’s ultimate liability and the amount Taction could recover remain undecided.