Stephen M. Hash - McDermott Will & Emery


Dr. Stephen M. Hash focuses his practice on life science litigation including cases involving pharmaceuticals and Paragraph IV disputes under the Hatch-Waxman Act. He has represented clients in numerous patent litigations, including cases relating to DNA sequencing technologies, cfDNA diagnostics, agricultural products, research tools, medical devices and numerous pharmaceutical products, including drugs for the treatment of migraine, sepsis, epilepsy, bipolar disorder, acne, Alzheimer’s, ADHD, and pain. He handles all phases of Paragraph IV disputes, including the cost-effective management of cases, from pretrial through trial and appeal.

Stephen has a strong technical background in life sciences with a particular focus on immunology and molecular biology.


Patent Litigation

  • Served as lead trial counsel for a DNA sequencing company in a patent jury trial in the District of Delaware. The favorable jury verdict, invalidating the four asserted patents, was affirmed on appeal (D. Del.) (CAFC)
  • Served as lead counsel in ITC investigations relating to nanopore sequencing technology. The summary determination of non-infringement was affirmed on appeal (ITC) (CAFC)
  • Served as lead counsel and tried a Hatch-Waxman case in which a pharmaceutical company defended its patents relating to a treatment for pain (D.NJ)*

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  • Managing Intellectual Property, IP Stars, 2014 to 2023
  • The Best Lawyers in America, Litigation – Intellectual Property, Austin, 2024
  • Texas Super Lawyer, 2014 to 2019


University of North Carolina School of Law, JD, with honors, 1999
Texas A & M University, PhD, Immunology, 1997
North Carolina State University, MS, Zoology, 1991
North Carolina State University, BSc, Zoology, 1989


US Patent and Trademark Office
US Court of Appeals for the Federal Circuit
US District Court for the Northern District of Texas
US District Court for the Southern District of Texas
US District Court for the Eastern District of Texas
US District Court for the Western District of Texas
US District Court for the Eastern District of Wisconsin