Software giant Microsoft has been told it will have to pay Alcatel-Lucent more than $511.6 million in damages and interest.

An appeals court has decided to let stand a jury's decision that the software maker infringed on two patents. It had also asked the U.S. District Court in San Diego to reconsider a federal jury's award in April to Paris-based Alcatel-Lucent of $357.7 million in damages. At issue was 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 $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. Judge Marilyn L. Huff denied Microsoft's request that she reconsider those findings, and upped what Microsoft had to pay to compensate for how long it took to resolve the matter.

However, Microsoft is still not giving up. It plans to appeal and so the matter will drag on.