Rambus Loses Round In DRAM Patent Suit

Law360, New York (December 29, 2008, 12:00 AM EST) -- Rambus Inc. will not be allowed to use the doctrine of equivalents to prove infringement in its heated patent dispute against rival manufacturers of dynamic random access memory, a federal judge has ruled.

U.S. District Judge Ronald Whyte granted the defendants’ motion for summary judgment of noninfringement under the doctrine of equivalents on Monday in the U.S. District Court for the Northern District of California, just weeks before the trial begins on Jan. 19.

The summary judgment means that Rambus will only be able to argue...
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