The long‑running Katy Perry trademark dispute has culminated in a highly anticipated High Court decision with significant implications for Australian trade mark law. In this timely seminar, Odette Gourley provides a clear and practical analysis of what the High Court decided and whether the door remains open for any further litigation. Explore how the decision reshapes the substantive grounds for trade mark cancellation, including how the law has changed. Odette will also unpack the High Court’s treatment of the discretion not to cancel a trademark, examining how it operates in practice and what the decision means for advising clients on registration, enforcement and risk.
- What did the High Court decide
- Will there be a further round of litigation and what will be the issues
- Substantive grounds for trade mark cancellation – has the law changed and if so how?
- Discretion not to cancel – how does it work and what effect will this have on your advice to clients?
Presented by Odette Gourley, Partner, Corrs Chambers Westgarth; Recommended Leading Contentious Intellectual Property NSW Lawyers, Doyle’s Guide
Kellie Stonier, Principal Lawyer, Stonier IP; Best Lawyers 2026, Intellectual Property Law
Attend and earn 1 CPE Hour in Trademarks
This program is applicable to practitioners from all States & Territories
Presenters

Kellie Stonier, Principal Lawyer, Stonier IP
Kellie Stonier is a highly regarded intellectual property lawyer and registered trade marks attorney with more than two decades of experience advising Australian and international clients on trade mark strategy, IP enforcement and commercialisation. She is the founder of Stonier IP and is recognised for combining technical excellence with practical commercial insight to help clients protect and maximise the value of their intellectual property assets. Kellie has been consistently recognised by Best Lawyers, Doyle’s Guide, Chambers & Partners and World Trademark Review for her expertise in intellectual property law and litigation. She also contributes actively to the profession through her role on the Intellectual Property Committee of the Law Council of Australia.
Odette Gourley, Partner, Corrs Chambers Westgarth
Odette has, for more than 20 years as a partner, advised on and conducted litigation covering intellectual property, competition and consumer law, and regulatory law. Odette is an expert on trade mark registration and portfolio management including clearance searches and advice, filing and prosecution of applications, portfolio management and oppositions. Across the full range of IP (patents, trade marks, copyright, designs, trade secrets, passing off etc), Odette has conducted major cases for leading companies in IP-driven sectors, including pharmaceutical, medical devices and biotechnology, high technology, fast moving consumer goods, food and beverages, manufacturing and services including media and communications, R&D, financial services, advertising and market research. Odette acts in significant competition and consumer law litigation including achieving a rare dismissal of ACCC anti-trust penalty and injunction proceedings in the marketing services industry. She advises on competition and consumer law compliance and training, clears advertising and marketing conduct, and acts in contested advertising and marketing disputes before industry bodies and the courts, relating to a wide range of goods and services. Odette is a part of the International Trademark Association Enforcement committee, an invited speaker at the Intellectual Property Society of Australia and New Zealand, and a panellist and chair at the Advertising Industry Jury.