Microsoft to Judges: Eolas Didn't Invent Patented Tech

An appeals court should throw out a half-billion-dollar patent infringement judgment against Microsoft because a lower court failed to recognize that the Web browsing patent was based on a technology that was not invented by the company awarded the money, a Microsoft lawyer argued Thursday.

Microsoft's attorney, Constantine Trela Jr., told a panel of judges at the U.S. Court of Appeals for the Federal Circuit in Washington, D.C., that Eolas Technologies' patent on functionality that allows browsers to recognize and run embedded applications on Web pages was demonstrated by ViolaWWW browser developer "Perry" Pei-Yuan Wei in May 1993. That was more than five years before the Eolas patent was granted, Trela said.

But Eolas lawyer Martin Lueck told the judges that the patent is valid because Wei abandoned the functionality in later versions of his browser and never demonstrated his browser's ability to run embedded applications to anyone, not even in the May 1993 demonstration with Sun Microsystems engineers. Wei used Viola on a computer that was not connected to the Internet; therefore, he couldn't show Sun employees an example of his browser running an application over the Internet, Lueck said.

Microsoft is appealing an August 2003 jury decision ordering the company to pay $520.6 million for using the Eolas patent in its Internet Explorer browser. A judge from the U.S. District Court for the Northern District of Illinois upheld the jury verdict in January. Microsoft is asking the appeals court to reverse the infringement verdict and send the case back to district court for a new trial.

Quizzing by Judges

The three-judge panel questioned Lueck about the validity of the patent, granted to the Regents of the University of California in November 1998. Researcher Michael Doyle developed the technology covered in the patent and went on to found Eolas.

Judge Randall R. Rader suggested that Wei didn't abandon Viola and the embedded application functionality but made the functionality public and improved the browser.

"That's not what happened," Lueck said. "If you put a feature in a piece of software, and you never show it to anyone, you never give it to anyone, and you never use it again, that's abandonment."

Later versions of Viola, including a version released about three weeks after Wei's meeting with Sun, didn't include the embedded applications functionality, Lueck told the judges.

But Rader questioned why the district court judge didn't even allow the jury to consider Viola as so-called prior art, an example of the technology's use before the patent was granted.


The Eolas lawsuit against Microsoft, filed in 1999, prompted an outcry from several Web experts, including Tim Berners-Lee, director of the World Wide Web Consortium. The U.S. Patent and Trademark Office late last year agreed to re-examine the patent and in March rejected it. The Regents of the University of California, holder of the patent, is appealing that decision.

Microsoft lawyer Trela argued that Wei continued to develop Viola after the May 1993 meeting with Sun, even corresponding with Doyle about it. Wei did show the embedded application functionality to Sun engineers, even if it was on a stand-alone computer, he added. "If there was some feature that wasn't demonstrated, it was obvious," he said.

The district court judge erred in not allowing the jury to examine the Viola functionality, Trela added. "The jury never got the chance to consider," he said.

The judges will rule on the case at a later date.

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