Microsoft has lost an appeal in its dispute with i4i over XML support in Office 2003/2007, following a decision by the US Court of Appeals for the Federal Circuit.
Loudon Owen, Chairman of i4i, said, "The appeals court has again upheld the lower court's decision in its entirety. In addition, it issued a more detailed analysis in concerning the finding of willfulness in this case. The determination is that Microsoft willfully infringed i4i's patent stands."
In an earlier hearing on 11 August 2009, the Honorable Judge Leonard Davis ruled in favour of i4i and found that Microsoft had willfully infringed i4i's US Patent No. 5,787,449.
Microsoft was forced to issue a 12.3Mbyte patch for Office 2007 to comply with a US court order banning the use of custom tagging after 10 January 2010.
Microsoft has now lost its appeal against this ruling.
The Court of Appeals is still considering a petition by Microsoft.