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Larissa Leong is an intellectual property lawyer with a practice that focuses on the strategic creation, development, and commercialization of intellectual property rights in Canada, the United States, and jurisdictions around the world. Larissa also holds a degree with distinction in pharmacology and computer science, which she leverages to understand complex inventions across a vast range of technical disciplines.

As a patent lawyer, Larissa advises multinational, national, and local clients on the protection and use of inventions in a diverse range of scientific and high-tech fields, including:

  • computer hardware and software, artificial intelligence, databases and data management, distributed computing, cloud computing, financial technology, cybersecurity, telecommunications, mobile devices and applications, image recognition and processing, computer-implemented business and regulatory platforms, healthcare technology, other computer-related technologies;
  • life sciences, pharmaceuticals, biologics, gene therapy, stem cells, immunotherapy, gene and protein expression, precision medicine, biomarkers, biotechnology, molecular biology, biochemistry, chemistry, medical devices; and
  • mechanical devices.

In these and other fields, Larissa works to obtain patents for clients, from drafting through to prosecution and grant. She directs the strategic development and management of global patent portfolios and advises on patentability, validity, infringement, and freedom to operate matters.  She counsels clients in collaborative contexts in the creation of agreements.  Larissa advances the protection of trademark and other intellectual property rights in both registration and contentious matters.

Prior to becoming a lawyer, Larissa conducted research in the areas of medical genetics as well as human-computer interaction, including under a research award from the Natural Sciences and Engineering Research Council of Canada (NSERC). Her research focused on the implementation of improved artificial intelligence technology for gait analysis with potential utility in rehabilitation; development of a computerized cognitive assessment tool for the early detection of dementia; and investigation into the effect of genetic mosaicism and microdeletions on medically pertinent patient characteristics.

While completing her law degree, Larissa was the recipient of a number of awards for academic excellence, legal writing, top standing in coursework, and community service.

Larissa draws from her experience at the Toronto office of a global law firm, at a leading national intellectual property law firm, and on a secondment to the legal group of a major financial institution.

Outside of the office, Larissa enjoys attending live musical acts and all things food.


  • Law Society of British Columbia
  • Law Society of Ontario
  • Canadian Bar Association
  • Intellectual Property Institute of Canada (IPIC)
  • Canadian Technology Law Association