University of Minnesota Asserts Hard Disk Chip Patent Against Avago and LSI in New Campaign

  • August 25, 2016

The Regents of the University of Minnesota have filed suit against Broadcom (Avago) and subsidiary LSI, alleging that the two companies have infringed a single patent (5,859,601) generally related to a method for encoding data for writing onto a magnetic disk in a hard disk drive (0:16-cv-02891). LSI is accused of infringement through its hard disk controller systems-on-a-chip (“SOCs”) and/or stand-alone read channel chips sold under the brand name TrueStore, including products that offer a technology called “Magnetic Transition Run” (MTR) that purportedly reduces error rates during data writing. Avago, meanwhile, is accused of infringement by handling the US sales and distribution of LSI products. The University pleads that the accused chips are incorporated into hard drives manufactured by Western Digital (HGST) and Seagate, neither of which is named as a defendant.


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