Department profile
Lenczner Slaght

Intellectual Property: Litigation

Canada Guide 2026 : Nationwide - Canada


Lenczner Slaght

Rankings

About

Provided by Lenczner Slaght

Lenczner Slaght is widely recognized as Canada’s leading litigation firm and a significant part of our success is our intellectual property practice.

We have extensive courtroom experience. Our team represents clients in all types of high-profile and technically sophisticated patent, trademark, and copyright matters in proceedings before the Federal Court, the Federal Court of Appeal, the Ontario Superior Court, the Ontario Court of Appeal and the Supreme Court of Canada.

Our lawyers have acted on some of Canada’s leading patent trials. We also have extensive experience litigating cases under the PM(NOC) Regulations for our pharmaceutical clients. In addition to our patent work, our lawyers have also litigated trade secret, copyright, trademark, competition law, confidential information and misleading advertising disputes. From seeking or fighting injunctions on the use of trademarks to arbitrations involving IP licensing contracts to complex drug product litigation, our lawyers have acted as advocates on the full range of intellectual property matters. We also advise clients on complicated issues at the intersection of intellectual property and competition law.

Chambers Review

Provided by Chambers

Intellectual Property: Litigation - Nationwide - Canada

Band 3

Band 3


What the Team is Known For

Lenczner Slaght is a well-recognised brand when it comes to dispute resolution and enjoys a solid reputation in the intellectual property market specifically. The team possesses significant experience handling complex patent cases, acting for a number of eye-catching clients in pharmaceuticals and technology. The department also regularly acts for clients engaged in copyright disputes.

Work Highlights

Provided by Chambers

  • Lenczner Slaght acted for a consortium of Canadian news media organisations in an action against OpenAI for breach of copyright, breach of online terms of use, breach of contract and unjust enrichment for using large amounts of their content to develop products, such as ChatGPT.

Strengths

Provided by Chambers

  • Lenczner Slaght stands out for its sharp strategic thinking, depth of expertise and ability to take total control of complex disputes.

    Intellectual Property: Litigation respondentCanada
  • The intellectual property litigation team at Lenczner Slaght is exceptionally knowledgeable and skilled. They provide practical solutions and operate like a well-oiled machine.

    Intellectual Property: Litigation respondentCanada
  • Lenczner Slaght are extremely bright and capable lawyers who deliver top quality work, every time. They are proactive in delivering helpful and practical advice and are highly responsive.

    Intellectual Property: Litigation respondentCanada
  • The team at Lenczner Slaght is incredibly intelligent and practical, whilst also responsive and works strategically with clients.

    Intellectual Property: Litigation respondentCanada

Notable Practitioners

Provided by Chambers

  • Band 2Jordana Sanft
    Band 2Jordana Sanft

    Jordana Sanft

    Jordana Sanft is a well-known contentious intellectual property lawyer, patent agent and trade mark agent with a particularly strong reputation in the life sciences industry.
    • Jordana Sanft is very strategic and is wonderful to work with.

      Intellectual Property: Litigation respondentCanada
    • Jordana is highly responsive and can distill complex subjects into practical advice.

      Intellectual Property: Litigation respondentCanada
    • Jordana has a brilliant legal mind.

      Intellectual Property: Litigation respondentCanada
  • Band 2Sana Halwani
    Band 2Sana Halwani

    Sana Halwani

    Toronto-based Sana Halwani is a well-regarded lawyer in the field of intellectual property and dispute resolution. She represents an impressive portfolio of clients in the technology, telecoms and biotechnology sectors.
    • Sana Halwani is strong across the board. She engenders confidence.

      Intellectual Property: Litigation respondentCanada
    • Sana is incredibly capable and keeps her clients as a top priority. She has a deep understanding of both the legal framework and the realities of the industry.

      Intellectual Property: Litigation respondentCanada
  • Up and ComingAndrew Moeser
    Up and ComingAndrew Moeser

    Andrew Moeser

    Andrew Moeser is a key part of the Lenczner Slaght intellectual property team, where he showcases considerable expertise acting in patent and copyright infringement actions.

    • Andrew is a strategic thinker and is able to formulate creative and practical solutions to overcome challenges.

      Intellectual Property: Litigation respondentCanada
    • Andrew Moeser has a brilliant legal mind.

      Intellectual Property: Litigation respondentCanada
  • Associates to watchJim Lepore
    Associates to watchJim Lepore

    Jim Lepore

    Jim Lepore is an experienced associate whose IP litigation practice includes significant patent and copyright infringement actions, most notably in the technology and energy sectors.

    • Jim is very attentive to moving matters forward and provides excellent work products. He is a keen litigator.

      Intellectual Property: Litigation respondentCanada
    • Jim Lepore is incredibly attentive and truly invested in getting the best possible outcome.

      Intellectual Property: Litigation respondentCanada

Ranked Individuals at Lenczner Slaght (4)

Nationwide - Canada

Members

Provided by Lenczner Slaght

What success is built on

Chambers is the leading data and intelligence partner for the legal sector.

Explore thought leadership