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In Re Rambus

Aug 16, 2012
Patent of the Week

In 2005, Rambus sued Hynix Semiconductor, Inc. and several other chip manufacturers alleging infringement of several patents in the 07/510,898 family

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Appellant Rambus Inc. appeals a final de-cision of the United States Patent and Trademark Office Board of Patent Appeals and Interferences in a reexamination in which claim 18 of Rambus’s U.S. Patent No. 6,034,918 was found invalid as anticipated. Because substantial evidence supports the PTO’s determination that claim 18, as correctly construed reads on the “memory module” in the prior art iAPX 432 Interconnect Architecture Reference Manual published by Intel Corp. in 1982 (“iAPX Man-ual”), the CAFC affirms.

The ’918 patent is titled “Method of Operating a Memory Having a Variable Data Output Length and Programmable Register” and is one of a family of patents that claim priority to U.S. Patent Application No. 07/510,898. The patents derived from the ’898 Application collectively make up the “’898 family.” The ’898 Application has a priority date of April 18, 1990, and thus, the ’918 Patent is now expired.

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