In the wake of a $467 million patent infringement verdict, Philips Electronics North America Corp. took aim at its accuser, Masimo Corp., claiming that the company’s lawyers at Knobbe, Martens, Olson & Bear withheld information from patent officials. But a federal judge in Delaware refused to let Philips off the hook on Monday, setting the stage for a likely appeal.

A jury in Wilmington saddled Philips with the megaverdict last October, finding that the company infringed two Masimo patents on technology for monitoring blood oxygen levels. In posttrial rulings on Monday, U.S. District Judge Leonard Stark denied Philips’ motions to trim the damages award and hold a new trial. He also refused to find that Stephen Jensen, John Grover and Jarom Kessler of Knobbe Martens engaged in inequitable conduct during the U.S. Patent and Trademark Office’s re-examination of one of the Masimo patents.

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