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Patricia O'Connell
Senior Communications Manager

Wiley Rein Client ARM Wins Significant Patent Infringement Dispute As A Defendant In The Eastern District of Texas

May 12, 2008

Wiley Rein Intellectual Property Practice partners James H. Wallace Jr., Kevin P. Anderson and Gregory R. Lyons have successfully defended ARM in a patent dispute brought by plaintiffs Technology Properties Limited, Inc. and Patriot Scientific Corporation before Judge Ward in the Eastern District of Texas.  The accused products were ARM’s microprocessor cores which are incorporated into many well-known portable devices.  ARM described the victory in the following press release.

Court Of Appeals Summarily Affirms ARM Litigation Victory Over TPL and Patriot
Court ruling means that ARM technology does not infringe any of the three patents asserted in case
CAMBRIDGE, UK – May 12, 2008 – ARM [(LSE:ARM); (Nasdaq:ARMHY)] today announced that the United States Court of Appeals for the Federal Circuit summarily affirmed on Friday, May 9 that ARM’s products do not infringe United States Patent No. 5,784,584 asserted by Technology Properties Limited, Inc. and Patriot Scientific Corporation. The Federal Circuit’s decision confirms ARM’s success in the litigation brought in Marshall, Texas entitled Technology Properties Limited, Inc. v. Fujitsu, et al. The ARM products covered by this binding decision of non-infringement include the ARM7™, ARM9™, ARM9E™, ARM10E™, ARM11™ and Cortex™ microprocessor core families.

TPL and Patriot previously admitted that ARM’s products did not infringe the ’584 patent unless the Federal Circuit overturned the lower court’s decision in favor of ARM. TPL and Patriot previously acknowledged that ARM’s products do not infringe the other patents asserted in the Texas litigation, United States Patent Nos. 5,809,336 and 6,598,148. Prior to ARM’s victory, cases involving the three patents asserted by TPL and Patriot have always been settled out of court by the parties involved. This is the first instance in which the court has issued a final ruling in favor of either party.

The Federal Circuit’s ruling of non-infringement does not impact the decision of the United States Patent and Trademark Office holding the asserted ’584 patent claim to be invalid and anticipated by 11 separate prior art references in reexamination proceedings.

About ARM
ARM designs the technology that lies at the heart of advanced digital products, from wireless, networking and consumer entertainment solutions to imaging, automotive, security and storage devices. ARM’s comprehensive product offering includes 32-bit RISC microprocessors, graphics processors, enabling software, cell libraries, embedded memories, high-speed connectivity products, peripherals and development tools. Combined with comprehensive design services, training, support and maintenance, and the company’s broad Partner community, they provide a total system solution that offers a fast, reliable path to market for leading electronics companies. More information on ARM is available at