Anthony Prenol

Lawyer, Trademark Agent, Patent Agent



Year of Call:

  • Ontario Bar, 1990
  • Trademark Agent (Canada), 1990
  • Patent Agent (Canada), 1997


BMath, University of Waterloo, 1992

LL.B., University of Toronto, 1988

Anthony is a founding partner of CPST Law LLP and its related patent and trademark agency firm, CPST Intellectual Property Inc. He is a lawyer, patent agent and trademark agent.

Anthony's practice covers the full range of intellectual property protection, enforcement and commercialization. He has acted as trial and appellate counsel in a wide variety of patent, trademark and copyright litigation matters. Anthony is responsible for the prosecution of patent, trademark and industrial design portfolios for clients in a wide variety of industries. In particular, he has extensive experience in the energy and financial services sectors. He regularly advises clients in areas such as trademark clearance, freedom-to-operate opinions, data protection for innovative drugs, comparative advertising, official marks, and matters arising under the Patented Medicines (Notice of Compliance) Regulations.

Anthony has been recognized as a leading patent and trademark lawyer in the following publications:

  • Managing Intellectual Property IP Stars (Patents and Trademarks)
  • WIPR Leaders
  • Who's Who Legal: Patents
  • Who's Who Legal: Trademarks
  • The Canadian Legal Lexpert Directory (Intellectual Property)
  • World Trademark Review 1000: The World's Leading Trademark Professionals
  • IAM Patent 1000: The World's Leading Patent Practitioners
  • Chambers Global: The World's Leading Lawyers for Business (Intellectual Property) 
  • Benchmark Canada: The Definitive Guide to Canada's Leading Litigation Firms and Attorneys - Litigation Star – Intellectual Property
  • LMG Life Sciences - Life Sciences Star
  • Intellectual Property Owners Association, Vice Chair - Industrial Designs Committee
  • International Trademark Association, Member - Legislation and Regulation Committee
  • Intellectual Property Institute of Canada
  • American Intellectual Property Law Association (AIPLA)
  • Canadian Bar Association
  • Author, Patent-Eligible Subject Matter, Practical Law Canada, November 2, 2021
  • Author, Canada chapter, “International Trademark Licensing”, Wolters Kluwer

  • Co-author, Then and Now: Assessing Canadian Practice One Year Into The New Regime, World Trademark Review Magazine, Fall 2020

  • Author, Sending Cease and Desist Letters in Canada, IP Litigator Magazine, July/August 2020
  • Author, Packers Plus v Essential Energy, Intellectual Property Magazine, February 28, 2020
  • Author, Canada chapter; Patent Laws and Regulations 2020; International Comparative Legal Guides (ICLG)
  • Author, Canada chapter; Patents Comparative Guide; Mondaq
  • Author, Canada Overhauls its Industrial Design System; Mondaq; November 7, 2018
  • Author; How to Navigate Canada’s Official Mark System; Mondaq; August 8, 2018
  • Speaker, “Brand Censored: Mitigating Challenges Facing Trademark Owners”, Intellectual Property Owners Association Annual Meeting, September 20, 2022
  • Moderator, "Design Rights and Trade Dress: Maximizing Your IP Strategy”, Intellectual Property Owners Association Annual Meeting, September 19, 2022
  • Speaker, “The Unlikely Innovators” Podcast, December 7, 2021
  • Speaker, "Enforcing Design Rights at the Border – A Global Perspective”, Intellectual Property Owners Association IP Chat Channel™, Learn More About the Counterfeit Goods Seizure Act – Enforcing Design Patents at the U.S. Border, June 17, 2021

The following is a sample of Anthony’s litigation matters:

  • represented the defendant, both at trial and on appeal, in defending a claim for infringement of a patent relating to oil and gas fracturing; successfully defended the allegations of patent infringement and also invalidated the patent (Packers Plus v. Essential Energy)
  • represented the defendant, both at trial and on appeal, in defending a claim for infringement of a patent relating to electrical switchgear; successfully defended the allegations of patent infringement and also invalidated the patent (ABB Inc. v. Hyundai Heavy Industries)
  • successfully represented the appellant in the Federal Court of Appeal in invalidating a third party’s trademark registration (Reynolds Presto Products v. P.R.S. Mediterranean)
  • successfully represented the defendant in applications for an interim injunction and an interlocutory injunction in relation to a software license agreement (ProPurchaser v. Wifidelity)

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