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McCarthy Tetrault
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McCarthy Tétrault is Canada's leading full-service national law firm, with offices across Canada, and in New York and London. We have Canada's pre-eminent IP litigation group, handling the country's most complex tech and life science’s patent disputes. Our practice encompasses PM(NOC) proceedings, biologics litigation, patent impeachment actions, patent register strategy, and cross-border coordination with leading U.S. and international firms.
Our successful track record in high-stakes patent disputes has been recognized by every major ranking publication: Chambers Canada — Band 1, Intellectual Property: Litigation; Managing IP — Patent Dispute Firm of the Year (2025); LMG Life Sciences — Disputes Firm of the Year (2024 & 2025); and Benchmark Litigation — IP Firm of the Year (2026)
When the mandate is consequential, clients trust McCarthy Tétrault. Leading multinational pharmaceutical companies and innovators rely on our team to protect their most valuable assets in Canada — and to win.