Osler, Hoskin & Harcourt LLP

Osler, Hoskin & Harcourt LLP is a leader in Canadian business law with a singular focus – clients’ businesses. With an integrated network of offices in Toronto, Montreal, Calgary, Ottawa, New York and Vancouver, our team of over 400 lawyers has the breadth and depth of experience to help to solve clients’ problems and provide the answers that they need in all areas of business law, including intellectual property.

Strength in intellectual property

Osler is home to “a spectacular IP department”. Our top-ranked IP team is renowned for its diverse strengths, including IP litigation and patent disputes. We have acted as counsel in complex litigation in every field of intellectual property and at every level of court in Canada, and have coordinated and managed prosecution and litigation strategies throughout multiple jurisdictions. Our international reputation for excellence in Canadian IP patent litigation has been built on our winning litigation record representing some of the world’s largest generic pharmaceutical companies and technology, biotech, life science, electronics, energy, consumer products and many other international and domestic innovators.

We have extensive experience in drafting, filing, prosecuting and maintaining patent and industrial design applications in Canada and the United States, including for Canadian and multinational companies in medical devices, electronics, consumer products, chemistry, biotechnology, pharmaceuticals, sports, food services and other sectors. We also supervise the filing and prosecution of patent applications outside North America on behalf of clients through our network of foreign associate law firms. The Osler IP team also serves a growing and robust international practice, representing Canadian patent interests of foreign companies.

Osler’s integrated team of professionals is involved in preparing numerous patent infringement and validity opinions, drafting patents and advising on the exploitation of obtaining IP rights with a coordinated worldwide strategy consistent with clients’ commercial business. Our exposure to complex litigation matters has proven invaluable in our drafting and prosecution practices – we are well aware of the many pitfalls to avoid.


Chambers Canada 2018 notes that “the range of expertise represented among Osler team members is second to none”. Osler is “consistently recommended” for its expertise in intellectual property and IP litigation (Ottawa) by The Canadian Legal Lexpert Directory 2017. The Best Lawyers in Canada 2018 acknowledges seven of our lawyers in IP law. The 2015 to 2018 issues of the Legal 500 ranked Osler in intellectual property. The latest Lexpert Guide to the Leading US/Canada Cross-Border Litigation Lawyers in Canada – a select group of Canada’s “top cross-border litigators” – recognises a member of our team. The IAM Patent 1000 2017 cited four team members as world-leading patent practitioners. The 2017 Managing Intellectual Property guide acknowledges four members of the team as IP Stars. Since 2012, the IP group has ranked Tier 1 for copyright in Canada in Managing Intellectual Property’s World IP Survey. The latest Benchmark Canada acknowledges a member of our team as a leading IP litigator in Ontario.

Recent notable cases

  • Osler continues to act as lead outside counsel to Mylan Pharmaceuticals ULC in connection with numerous complex patent litigation, class action and other matters, including ongoing cases seeking early market entry. Osler recently represented Mylan Pharmaceuticals in three successive victories in patent proceedings.
  • Osler is representing Samsung Bioepis in the defence of eight separate applications under the Patented Medicines (Notice of Compliance) Regulations.
  • Osler acts as lead Canadian counsel responsible for prosecution, management, enforcement and licensing of patent and industrial design portfolios for various leading national and multinational companies, or indirectly through foreign law firms on an agency basis.

Contact details

Osler, Hoskin & Harcourt LLP
340 Albert Street
Suite 1900
Ottawa ON K1R 7Y6

Professional contacts

Other offices

  • Calgary
  • Montreal
  • New York
  • Toronto
  • Vancouver

Sample client list

  • Celltrion
  • Covidien, Delphi Energy
  • Mylan
  • Samsung Bioepis
  • Standard Innovation
  • Teva

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