Keranos, LLC v. Silicon Storage Tech., Inc., No. 14-1360 (Fed. Cir. 2015)
Annotate this CaseIn 2010, Keranos sued 49 parties for infringing three patents by using a specific type of flash memory technology developed by SST, called “SuperFlash,” that implements a split-gate flash memory design. Keranos, which was formed weeks earlier, obtained the rights to the asserted patents from UMC, through an “Exclusive Patent License and Royalty Agreement.” UMC continued to hold the legal title to the asserted patents, all of which expired in 2006-2008. Keranos did not join UMC as co-plaintiff. SST and certain defendants then sued Keranos, UMC, and others, seeking declaratory judgments of noninfringement and invalidity of the same patents. The cases were consolidated into two cases. Following a joint Markman hearing, the district court regrouped the defendants into two new cases: case 00017 pitting Keranos, UMC, and individuals against the manufacturers of the accused products, and case 00018, pitting Keranos against the alleged customers of the accused products who incorporated those products into larger products for sale. The Federal Circuit agreed with the district court that Keranos has standing to sue for infringement of the asserted patents, but vacated and remanded for consideration of Keranos’s motions for leave to amend infringement contentions based on the local patent rules.
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