Kramer Alberti notched another PTAB clean sweep victory – this time for client Polaris PowerLED Technologies, LLC (“Polaris”), winning denial of institution of all three inter partes review petitions (“IPRs”) filed by Western Digital Technologies, Inc. and Sandisk Technologies Inc.

Western Digital and Sandisk challenged the validity of Polaris’ three foundational patents, but the Patent Office rejected these petitions and denied institution. The IPRs are captioned in the Patent Office PTAB as Sandisk Technologies Inc. and Western Digital Technologies, Inc., IPR 2025-00515, IPR2025-00516, and IPR2025-00517.

Polaris’ patented inventions are directed to flash memory used in computing, gaming, data storage, and e-commerce. The inventions are innovative techniques for improving nonvolatile memory controllers, including the processing of memory commands and the generation of a completion status for such commands.

“Polaris engaged my team and me to file a three-patent case in the U.S. District Court in California, which we are vigorously litigating against Western Digital and Sandisk. In this important decision, the PTAB has denied institution of all three of Western Digital and Sandisk’s IPRs that challenged the validity of Polaris’ foundational patents. This victory, with our team running the table on behalf of Polaris, is remarkable,” stated Kramer Alberti partner and lead counsel for Polaris, Rob Kramer. “We are very happy for Polaris, and we’ll now head to trial against Western Digital and Sandisk in the district court in Los Angeles,” explained Kramer.

To secure the IPR victories for Polaris , Kramer Alberti co-counseled in the PTAB with attorneys from Sterne, Kessler, Goldstein & Fox, PLLC, with whom they have a strong relationship.  Opposing counsel representing Western Digital and Sandisk in the district court case and related IPRs is the Haynes & Boone LLP firm.

About Kramer Alberti Lim & Tonkovich LLP

Kramer Alberti attorneys are passionate courtroom champions of their clients’ inventions, and nationally known as among the very best and most experienced patent litigators in the country. Founded in 2010, and based in Silicon Valley with attorneys in New York, Austin, and Washington, D.C., the firm is a highly sought-after patent litigation solutions provider representing inventors, technology companies, and universities enforcing their most valuable patents against infringement. With a team of more than 20 technically trained and experienced patent litigation trial attorneys, the firm represents an unrivaled assembly of specialized practitioners.  A frequent recipient of national recognition from and within the legal community, the firm is one of a select few to have been named to both the National Law Journal’s and Texas Lawyer’s list of Top Verdicts. Kramer Alberti is positioned as the firm of choice for plaintiffs seeking large recoveries in patent monetization and clients in need of objective-based IP solutions. For more on Kramer Alberti, please visit www.krameralberti.com

Learn More About Kramer Alberti Lim & Tonkovich LLP

Robert Kramer |  650.514.2747