Eolas v. Microsoft (2004, USA)
In Eolas v. Microsoft, Microsoft was accused of infringing a software patent held by Eolas on webbrowser plugins. Microsoft lost the case in 2003 and was ordered to pay $521 million, and lost an appeal in 2004. In 2005, a court allowed a further appeal, but before this would happen, Microsoft made an undisclosed settlement with Eolas in 2007.
In 2003, the USPTO was asked to re-examine the validity of Eolas' patent. In the early stages of this re-examination, in 2004, USPTO found it invalid, but in the final decision in 2005 it was found to be valid.
In 2009, Eolas announced it was suing 23 other large companies based on this patent plus a new one (see Eolas v. many defendants (2009, USA)).
 Related pages on en.swpat.org
- http://news.zdnet.co.uk/software/0,1000000121,39240180,00.htm Eolas vs. Microsoft]
- Patents of Mass Destruction, 9 Sep 2003, eWeek
- Microsoft Browser Suit: Victor Girds for New Battles, 24 Aug 2003, eWeek
 Patently-o coverage
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