Mentor Graphics Wins Another Motion for Summary Judgment

Court Finds Cadence's Mercury and MercuryPlus Infringe Mentor Patent

WILSONVILLE, Ore.--(BUSINESS WIRE)--Aug. 22, 2002--Mentor Graphics Corporation (Nasdaq:MENT - News) announced today that the United States District Court for the Northern District of California granted Mentor's motion for summary judgment of infringement against Cadence Design Systems (NYSE:CDN - News).

In a 19-page opinion entered in Case No. C 00-1030 SI, the Court found that Cadence's Mercury and MercuryPlus emulator products infringe a claim of Mentor's U.S. Patent No. 5,999,725 (the '725 patent). This order follows the same Court's summary judgment finding that Cadence's MercuryPlus infringed another Mentor patent on April 9, 2002.

"We are certainly pleased that the Court agreed with us that the Mercury and MercuryPlus emulators infringe the '725 patent," said Dean Freed, general counsel of Mentor Graphics. "As we mentioned earlier this year when we received our first summary judgment of infringement, we believe just as strongly that the three other patents in this case are infringed by Cadence's Mercury and MercuryPlus products. Hearings on additional summary judgment motions for infringement and invalidity are scheduled for October and November of this year. A trial of the remaining issues in this case, including Mentor's claim of trade secrets theft, is set for January 6, 2003. We look forward to finally being able to present our facts to a jury."

Prior to the present summary judgment ruling on the '725 patent, the court invalidated another single claim in the patent.

Mentor Graphics Corporation 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 $600 million and employs approximately 3,700 people worldwide. Corporate headquarters are located at 8005 S.W. Boeckman Road, Wilsonville, Oregon 97070-7777; Silicon Valley headquarters are located at 1001 Ridder Park Drive, San Jose, California 95131-2314. World Wide Web site: 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.

     Mentor Graphics Corporation, Wilsonville
     Ryerson Schwark, 503/685-1660
     ry_schwark@mentor.com