It’s a battle between Katy Perry and Katie Perry. One is an international pop super star, the other an Australian fashion designer. 

Now after 15 years the case has reached its climax, landing in the High Court. 

So, who will get to claim the name? 

Today, Dr Sarah Hook an intellectual property law expert at UTS steps us through the trademark fight and what it could mean for all Australian brands. 

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Dr Sarah Hook, Senior Lecturer at the School of Law at University of Technology Sydney