Mentor Graphics Files Import Suspension Application Against EVE with Japanese Customs Office

TOKYO, July 20, 2010—Mentor Graphics Corporation (NASDAQ: MENT) today announced it had filed an import suspension application against EVE emulation products in Japan with the Japanese Customs Office.

The filing requests that Japanese Customs issue a ruling that EVE emulation products infringe Mentor Graphics’ intellectual property. The application also requests that, upon making such a determination, the Japanese Customs Office bar importation of EVE products into Japan.

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/.