A US federal judge ordered Microsoft to pay Alcatel-Lucent €328 million (US$511.6 million) in damages and interest, letting stand a jury's decision that the software maker infringed on two patents, an Associated Press report said.
Microsoft vowed to appeal the decision, which marked the latest move in a 5-year-old patent scuffle between the two companies, the Associated Press report also said.
The world's largest software maker had asked the US District Court in San Diego to reconsider a federal jury's award in April to Paris-based Alcatel-Lucent of €229.1 million (US$357.7) million in damages.
The jury found that the software maker infringed on an Alcatel patent that covers how software users select a calendar date from a menu in certain programs, including Microsoft Outlook and Windows Mobile.
The jury also awarded Alcatel-Lucent €6.6 million (US$10.4 million) from Microsoft after finding the software maker infringed on an patent related to the use of a stylus on a tablet computer.
Earlier, Judge Marilyn L. Huff denied Microsoft's request that she reconsider those findings, and she raised the amount of damages due Alcatel-Lucent.
The amounts now include prejudgment interest to compensate for how long it took to resolve the matter.