Oral arguments got under way Tuesday in the federal patent trial between Apple and Samsung.

Lawyers from both sides argued over what, amid a mountain of emails and technical documents, could be included as evidence in the trial.

Tech reporter Ina Fried, from All Things D, says the judge rejected Samsung's plea to admit two key pieces of evidence.

"One relates to the influence of Sony on Apple's designs," she said. "The other relates to how long Samsung was working on some products that were introduced after the iPhone but were in design before the iPhone came out."

Apple has accused Samsung of copying elements from its iPhone and iPad designs. The company is seeking $2.5 billion and to block the sale of Samsung's smartphones in the U.S.

Samsung is countersuing for patent infringement.

The trial resumes Friday.