Rambus Forces Reality Check
In January, the U.S. Court of Appeals for the Federal Circuit gave standards organizations a patent-policy reality check. In Rambus v. Infineon, the court found that Rambus did not commit fraud by failing to disclose pending patents until after they had been incorporated into an EIA/JEDEC standard for SDRAM. The court did not find substantial evidence that Rambus breached its duty to members of the SDRAM committee under the joint EIA and JEDEC policies.
Rambus, which develops and licenses memory and logic interfaces for microchip manufacturers, was a member of that committee from December 1991 to December 1995. In 1993, JEDEC adopted a standard for SDRAM to increase the speed a CPU can read or write memory by synchronizing with the CPU's clock speed. The EIA/JEDEC patent policy required members to disclose any knowledge of relevant patents or pending patents related to its committees' work. But Rambus disregarded the committee policy.
In late 2000, Rambus sued Infineon, a manufacturer of semiconductor memory devices (and a member of JEDEC), for patent infringement based on four patent applications filed between 1997 and 1999. These claims were substantially identical to Rambus' patent application for DRAM or RDRAM filed in 1990 with the U.S. Patent and Trademark Office and a 1991 application under the Patent Cooperation Treaty. Although the trial court did not find Infineon guilty of infringement, it did find Rambus guilty of fraud under Virginia state law for not disclosing to JEDEC its patents and patent applications related to SDRAM.