SAN JOSE, Calif. >> A Silicon Valley jury today added $290 million more to the damages Samsung Electronics owes Apple for copying vital iPhone and iPad features, bringing the total amount the South Korean technology titan is on the hook for to $930 million.

The verdict covers 13 older Samsung devices that a previous jury found were among 26 Samsung products that infringed Apple patents.

The previous jury awarded Apple $1.05 billion. But U.S. District Judge Lucy Koh reduced the damages to $640 million after ruling that jury miscalculated the amount owed on 13 devices and ordered a new trial.

Apple had asked for $380 million, arguing Samsung’s copying cost it a significant amount of sales. Samsung countered that it owed only $52 million because the features at issue weren’t the reasons most consumers chose to buy Samsung’s devices instead of Apple’s.

Samsung said it would appeal both verdicts.

“For Apple, this case has always been about more than patents and money,” Apple spokeswoman Kristin Huguet said. “While it’s impossible to put a price tag on those values, we are grateful to the jury for showing Samsung that copying has a cost.”

A third trial is scheduled for March to consider Apple’s claims that Samsung’s newest devices such as the popular Galaxy S III on the market also copied Apple’s technology.

Apple and Samsung are the world’s two biggest smartphone makers. The bitter rivals have been waging a global battle for supremacy of the $300 billion worldwide market. The size of the award didn’t faze Wall Street or harm or help either company’s financial fortunes in any significant way.

Samsung reported it had $47 billion in cash at the end of September and racked up $247.5 billion in revenue last year. Apple has $147 billion of cash on hand and took in $170.9 billion in revenue last year.

“We understood that the money wasn’t really an issue,” said juror Barry Goldman-Hall. “This was about the integrity of the patent process.”

Goldman-Hall, 60, of San Jose was one of two men and six women on the jury, which was tasked only with determining damages.

Apple has argued in courts, government tribunals and regulatory agencies around the world that Samsung’s Android-based phones copy vital iPhone features. Samsung is fighting back with its own complaints that some key Apple patents are invalid and Apple has copied Samsung’s technology.