Osler, Hoskin & Harcourt LLP

With an integrated network of offices in Toronto, Montreal, Calgary, Ottawa, New York and Vancouver, Osler, Hoskin & Harcourt LLP’s team of more than 460 lawyers, patent agents and trademark agents 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 before every level of the Canadian courts, and have coordinated and managed prosecution and litigation strategies through 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, technology, biotech, life sciences, 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.


The IAM Patent 1000 cites four Osler team members as world-leading patent practitioners, noting “most importantly, they know how to win”. Our team is also “responsive, timely on deliverables and cost-conscious”. Chambers Canada 2020 notes that Osler is “well regarded for handling the IP aspects of corporate transactions”. Osler is “consistently recommended” for its expertise in intellectual property and IP litigation (Ottawa and Toronto) by The Canadian Legal Lexpert Directory 2019 and the Lexpert Guide to the Leading US/Canada Cross-Border Litigation Lawyers in Canada recognises a member of our team. The 2015 to 2019 issues of the Legal 500 rank Osler in intellectual property. The 2019 Managing Intellectual Property guide acknowledges four members of the team as IP Stars. The latest Benchmark Canada acknowledges a member of our team as a Litigation Star in intellectual property.

Recent notable cases

  • 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.
  • Representing Teva Canada in numerous Patented Medicines (Notice of Compliance) Regulations proceedings.
  • Representing VMware in a complex technology patent proceeding in the Federal Court.
  • Lead Canadian counsel responsible for the 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
  • Mylan
  • Samsung Bioepis
  • Standard Innovation
  • Teva Canada
  • VMware

Recommended individuals at this firm