David O'Dell in Law360: USPTO Wipes Out Key Rambus DRAM Patent


The U.S. Patent and Trademark Office on Tuesday invalidated another Rambus Inc. patent that has been at the center of the technology licensing firm’s victories at the U.S. International Trade Commission.

The USPTO's Board of Patent Appeals and Interferences rejected Rambus’ U.S. Patent Number 6,591,353, one of the so-called Barth patents that covers a method and apparatus for controlling data transfers to and from dynamic random access memory, in a re-examination proceeding initiated by Nvidia Corp. The board reversed an examiner’s finding that 26 claims were not obvious, while affirming the examiner’s rejection of seven of those claims as anticipated...

The ruling came after the board in September tossed a slew of claims from the other two Barth patents — U.S. Patent Numbers 6,470,405 and 7,287,109 — covering DRAM technology. Those re-exam proceedings were also launched by Nvidia.

"This now means that all claims of all three of Rambus' 'Barth 1' patents have been invalidated by the board at the PTO," said David O'Dell, an attorney at Haynes and Boone LLP, which represents Nvidia...

Excerpt from Law360, Jan. 27, 2012. To view the full article, click here (subscription required).

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