Chicago-based Eolas Technologies had filed the suit against Microsoft in 20003. That resulted in a federal court ordering Microsoft to pay the company a staggering $521m for infringements to plug-in technology that embeds small software programs into Web pages. That decision was later overturned by a US Court of Appeals in 2005 and a new trial ordered.

The Web browser technology was developed by Eolas’ chairman at the University of California at San Francisco. The University owns the patent while Eolas owns exclusive marketing rights.

The settlement comes just days before a retrial of the 2003 lawsuit was set to begin.