U. of California Patent Is Ruled Invalid

By ANDREA L. FOSTER

In a setback for the University of California system and a private software company, the U.S. Patent and Trademark Office has issued a preliminary ruling that invalidates a patent on Web-browser technology made popular by the Microsoft Corporation.

If the ruling is made final, the university's $520.6-million patent-infringement verdict against Microsoft could be overturned.

The case centers on Web-browser technology that launches and displays plug-ins and applets automatically.

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Past Coverage

U.S. Patent Office Takes Step to Invalidate Patent Worth Millions to U. of California - March 9, 2004
U.S. to Review Web-Browser Patent Held by U. of California - November 28, 2003
U.S. Office Rules Against U. of California's Web-Browser Patents - September 3, 2004
U. of California Wins a Round in Dispute With Microsoft - October 14, 2005
New Ruling in Patent Dispute - September 30, 2005

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U. of California Patent Is Ruled Invalid

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