In the latest development in the high-profile patent-infringement trial pitting Apple against Samsung, US District Court Judge Lucy Koh reduced almost half of the $1 billion damage award which a jury had ordered Samsung to pay to Apple.

On Friday, Judge Koh invalidated nearly $450 million of the $1 billion damage award, saying that the calculation of the award was apparently based on an "impermissible legal theory." While the judge affirmed the damage award's remaining amount, approximately $598.9 million, she turned down Apple's request for an increase in damages.

Lowering Samsung's bill to Apple by nearly $450 million for 14 Samsung devices including some of the hottest-selling products in its Galaxy lineup, Judge Koh said that, while calculating the damages, the jurors had failed to properly follow the instructions that she had given.

Ordering a new trial for calculation of damages for the 14 devices, Judge Koh also added that the jurors had also erred while determining when Samsung was first notified by Apple for the alleged infringements of patents for its iPhone and iPad.

In response to Judge Koh's decision of reducing the damage award, Samsung spokeswoman Lauren Restuccia said: "We are pleased that the court decided to strike $450,514,650 from the jury's award. Samsung intends to seek further review as to the remaining award."