Apple Inc. failed to persuade a federal judge to rule that two Samsung Electronics Co. patents are unenforceable because they allegedly were obtained through manipulation.

U.S. District Judge Lucy Koh in San Jose, Calif., said in an order today that she won't consider Apple's legal arguments about the Samsung patents because a jury found that the iPad-maker hadn't infringed them. Samsung has said the patents are essential to an industry standard for 3G mobile technology. It sued Apple last year, accusing it of infringement.

The jury found in Apple's favor at trial. Still, Apple sought a ruling from Koh that the patents were unenforceable, alleging Samsung manipulated technology standard-setting processes to obtain them, according to court filings.

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"Because the court finds that these defenses cannot affect the outcome of the present case in light of the jury's finding of noninfringement, the court, in its discretion, will not consider these defenses at this time," Koh said in her ruling.

Kristin Huguet, a spokeswoman for Cupertino, Calif.- based Apple, didn't immediately respond to an e-mail seeking comment on the ruling. Adam Yates, a spokesman for Samsung, didn't immediately respond to an e-mail seeking comment on the decision.