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Cynthia L. Tape listen


Cynthia* is recognized for her extensive experience as litigation counsel, in both IP and complex commercial litigation matters. With a Ph.D. and two decades under her belt, Cynthia knows§ how to skillfully navigate complicated scientific and legal issues in technical cases and distil them into clear and compelling concepts for the courts. An enthusiastic piano student in her spare time, Cynthia enjoys tackling new pieces and finding inspiration in the score . She uses her wide-ranging expertise to compose creative solutions for her clients and provide invaluable counsel to her colleagues that ultimately put them on a path to success. .


  • Practice Areas:
  • Bar Admissions:
    • Ontario (1997)
    • New York (1997)
  • Education:
    • Queen’s University (1994) LLB
    • Queen’s University (1992) Ph.D. (Pathology)
    • Queen’s University (1985) BSc (Honours – Life Sciences)


Cynthia L. Tape

is counsel at Lenczner Slaght.

Cynthia’s practice focuses on patent and commercial litigation. She has extensive experience in pharmaceutical and biotechnology patent cases, and has been involved as litigation counsel in IP and regulatory matters before the Federal Courts, the Ontario Superior Court of Justice, and the Supreme Court of Canada. She has also appeared as counsel in cases before those courts, the Court of Appeal for Ontario and administrative tribunals. Prior to joining Lenczner Slaght, she practiced in the patent and commercial litigation groups of leading Canadian firms.

Cynthia taught patent law at Queen’s University’s Faculty of Law for many years and won the Law Students Society’s award for excellence in teaching. She is a past Chair of the CBA’s National IP Section Executive, and has written papers and spoken at conferences on various IP and regulatory topics. Cynthia is co-editor of the Canadian adaptation of Lubet’s Modern Trial Advocacy: Analysis & Practice, now in its 4th edition.

Before her call to the Bar, Cynthia served as Law Clerk to the Honourable Charles Dubin, Chief Justice of Ontario, and puisne justices of the Court of Appeal for Ontario, and to the Right Honorable Beverley McLachlin, Chief Justice of Canada (retired), at the Supreme Court of Canada.

Prior to attending law school, Cynthia obtained a Ph.D. (Pathology) from Queen’s University. Her doctoral research was on the protein biochemistry of amyloidosis.

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  • Ontario Bar Association

  • The Advocates’ Society

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  • Best Lawyers in Canada (2021-2024)

    Biotechnology and Life Sciences Practice, Corporate & Commercial Litigation, Intellectual Property

  • Canadian Legal Lexpert® Directory (2021-2022)

    Life Sciences & Health

  • IAM Patent 1000 (2021-2024)

    Patent Litigation: Recommended Individual (Bronze)

  • Lexpert Special Edition: Canada's Leading Health Sciences Lawyers (2021)

  • Lexpert Special Edition: Canada's Leading Technology & Health Sciences Lawyers (2022)

  • The Legal 500 Canada (2023 - 2024)

    Intellectual Property (Recommended Lawyer)

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