European Patent Office Issues Rulings on Rambus Patent

Rambus Inc., (NASDAQ:RMBS) announced that the European Patent Office (EPO) today made several rulings related to Rambus' European patent 0 525 068. The EPO affirmed the novelty and inventiveness of the patent, rejecting numerous "prior art" arguments raised by three major semiconductor manufacturers. The EPO also applied a unique aspect of European patent law, confirming the validity of Rambus' patent only as further amended to conform more closely to the language as originally filed in 1990. This last aspect of today's ruling, which reversed a prior EPO decision, will be appealed by Rambus. It is not expected to affect litigation in the United States, where different law applies and more extensive claim amendments are permitted.

"While aspects of today's ruling will likely complicate and delay the proceedings in Europe, we are pleased that the originality and inventiveness of our patents have been affirmed," said John Danforth, senior vice president and general counsel for Rambus.

Editor's Note: the Rambus claim language as amended today can be found here.

About Rambus
Rambus is the leading developer and marketer of breakthrough chip-to-chip interface technology, products and solutions to the electronics industry. The company licenses its technology in the form of ASIC cells that are incorporated into high-performance memory and logic chips by 25 of the world's top semiconductor makers. The company's ASIC cells and system-level solutions are incorporated into hundreds of unique electronic products.

This press release contains forward-looking statements. These statements are based on current expectations, estimates and projections about the Company's industry, management's beliefs, possible litigation outcomes and effects and certain assumptions made by the Company's management. You can identify these and other forward-looking statements by the use of words such as "may", "will", "should," "expects," "plans," "anticipates," "believes," "estimates," "predicts," "intends," "potential," "maintains", "continue" or the negative of such terms, or other comparable terminology. Forward-looking statements also include the assumptions underlying or relating to the foregoing statements. Actual results could differ materially from those anticipated in these forward-looking statements as a result of various factors, including those identified in the Company's recent filings with the Securities and Exchange Commission, including its recently filed Form 10-Q, and also including the uncertainty of new technologies; and the uncertainty regarding the technical and market demands for such technologies. All forward-looking statements included in this press release are based on information available to Rambus on the date hereof. Rambus assumes no obligation to update any forward-looking statements.

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