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Mark A. Hayden
Associate
Litigation
New York
mark.hayden@wsgr.com

D212-453-2868

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Mark Hayden is an associate in the New York office of Wilson Sonsini Goodrich & Rosati, where his practice focuses on intellectual property litigation with a particular emphasis on representing clients in the life sciences industry. He has significant experience litigating under the Hatch-Waxman Act and has played key roles in fact and expert discovery, depositions, trial, and appellate proceedings.

Before attending law school, Mark worked in a research laboratory at Brigham & Women’s Hospital/Harvard Medical School focused on using next generation sequencing (NGS) technologies to elucidate the molecular and genetic underpinnings of cancers, gynecological diseases, and human developmental disorders.

In addition to his commercial work, Mark is actively involved in pro bono work, representing clients in probate guardianship and immigration proceedings, as well as providing guidance to non-profit organizations and small businesses on intellectual property-related matters. 

Mark is also registered to practice before the U.S. Patent & Trademark Office.

Experience

Mark Hayden is an associate in the New York office of Wilson Sonsini Goodrich & Rosati, where his practice focuses on intellectual property litigation with a particular emphasis on representing clients in the life sciences industry. He has significant experience litigating under the Hatch-Waxman Act and has played key roles in fact and expert discovery, depositions, trial, and appellate proceedings.

Before attending law school, Mark worked in a research laboratory at Brigham & Women’s Hospital/Harvard Medical School focused on using next generation sequencing (NGS) technologies to elucidate the molecular and genetic underpinnings of cancers, gynecological diseases, and human developmental disorders.

In addition to his commercial work, Mark is actively involved in pro bono work, representing clients in probate guardianship and immigration proceedings, as well as providing guidance to non-profit organizations and small businesses on intellectual property-related matters. 

Mark is also registered to practice before the U.S. Patent & Trademark Office.

Education
  • J.D., Boston College Law School

    Managing Editor, Boston College Law Review

  • B.B.A., Finance, The College of William & Mary

    Minor in Biochemistry; Research Fellow, Department of Neuroscience

Admissions
  • State Bar of New York
  • U.S. Patent and Trademark Office
Credentials
Education
  • J.D., Boston College Law School

    Managing Editor, Boston College Law Review

  • B.B.A., Finance, The College of William & Mary

    Minor in Biochemistry; Research Fellow, Department of Neuroscience

Admissions
  • State Bar of New York
  • U.S. Patent and Trademark Office

Select Publications

  • Author, “The Burgeoning ‘Biorights Movement’: Its Legal Basis, What’s at Stake, and How to Respond,” Boston College Law Review, 2018
  • Lead author, “Clinical, Pathologic, Cytogenetic, and Molecular Profiling in Self-Identified Black Women with Uterine Leiomyomata,” 222–223 Cancer Genetics 1–8, 2018
  • Co-author, “The Genomic Landscape of Balanced Cytogenetic Abnormalities Associated with Human Congenital Anomalies,” 49(1) Nature Genetics 36–45, 2017
  • Co-author, “Structural Chromosomal Rearrangements Require Nucleotide-Level Resolution: Lessons from Next-Generation Sequencing in Prenatal Diagnosis,” 99(5) American Journal of Human Genetics 1015–1033, 2016
Insights

Select Publications

  • Author, “The Burgeoning ‘Biorights Movement’: Its Legal Basis, What’s at Stake, and How to Respond,” Boston College Law Review, 2018
  • Lead author, “Clinical, Pathologic, Cytogenetic, and Molecular Profiling in Self-Identified Black Women with Uterine Leiomyomata,” 222–223 Cancer Genetics 1–8, 2018
  • Co-author, “The Genomic Landscape of Balanced Cytogenetic Abnormalities Associated with Human Congenital Anomalies,” 49(1) Nature Genetics 36–45, 2017
  • Co-author, “Structural Chromosomal Rearrangements Require Nucleotide-Level Resolution: Lessons from Next-Generation Sequencing in Prenatal Diagnosis,” 99(5) American Journal of Human Genetics 1015–1033, 2016
Focus Areas
  • Intellectual Property
  • Litigation
  • Patent Litigation
  • Post-Grant Review
  • Trade Secret Litigation
Recent Insights
Client Highlights
Wilson Sonsini Successfully Represents Impossible Foods in First-of-Its-Kind FoodTech Patent Suit
Wilson Sonsini served as lead counsel for Impossible Foods in a patent infringement litigation alleging infringement of seven Impossible Foods patents covering manufacturing processes, ingredients, and finished products relating to plant-based food containing heme and Impossible’s innovative transgenic yeast used to manufacture that heme. Our team successfully represented Impossible Foods in defense of six inter partes review petitions before the Patent Trial and Appeal Board in 2022 and 2023. Wilson Sonsini defeated the defendant’s motion to dismiss and motion to stay the District Court litigation. The matter was closely watched as the first patent infringement case in the burgeoning foodtech industry. With trial approaching, the parties resolved the matter and released a joint statement that said: “This resolution affirms Impossible Foods’ category leadership and the strength of its product portfolio related to heme.”  
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