MENT Mentor Graphics Corp.

Mentor Graphics Corporation (NASDAQ: MENT) today announced it had filed a patent infringement suit against EVE in the U.S. Federal District Court for the District of Oregon.

The suit alleges that EVE products violate Mentor Graphics' patent rights under United States Patent No. 6,876,962 issued April 5, 2005, and seeks damages and to bar their manufacture and sale in the United States.

"Intellectual property is the lifeblood of a technology company," said Tom Evans, corporate intellectual property counsel for Mentor Graphics. "We have an obligation to our shareholders to defend our intellectual property when we believe it has been infringed."

About Mentor Graphics Mentor Graphics Corporation (NASDAQ: MENT) is a world leader in electronic hardware and software design solutions, providing products, consulting services and award-winning support for the world's most successful electronics and semiconductor companies. Established in 1981, the company reported revenues over the last 12 months of about $800 million. Corporate headquarters are located at 8005 S.W. Boeckman Road, Wilsonville, Oregon 97070-7777. World Wide Web site: http://www.mentor.com/.

(Mentor Graphics is a registered trademark of Mentor Graphics Corporation. All other company or product names are the registered trademarks or trademarks of their respective owners.)

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For more information, please contact: Ry Schwark Mentor Graphics 503.685.1660 ry_schwark@mentor.com