David Longmuir

Principal
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David is an experienced IP litigator and registered patent and trade marks attorney who brings a technological understanding together with legal expertise to resolve IP disputes for Australian and international businesses.

Service Areas

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With more than 20 years experience across all areas of IP, David has significant experience in the life sciences and has been involved in major patent litigation in the chemical, biotechnology, agriculture and pharmaceutical areas. He is particularly interested in plant breeder’s rights and regularly assists breeders and owners to obtain, commercialise and enforce PBRs including in infringement proceedings before the Federal Court of Australia and objection and revocation proceedings before Plants Breeder’s Rights Office.

David is also known for his work in brand protection and strategic brand management for well-known Australian and International brands and recently had the conduct of a successful appeal to the High Court of Australia for Bed Bath ‘N’ Table Pty Ltd which clarified the approach to reputation based claims in Australia.

David has been recognised as a leading practitioner in the IAM Patent 1000 2025 and WTR 1000 2026 and is one of the WTR Global Leaders 2025: Private Practice.

Expertise & Experience

  • Life Sciences & Biotechnology
  • Applied Chemistry & Materials Science
  • Emerging & Interdisciplinary

Qualifications

  • BSc (Hons) LLB (Hons) LLM FIPTA

More about David

Tech I can’t live without

Coffee machine and grinder

Favourite place

Bath, spa or hot springs

Top of your bucket list 

Go to the Ashes and F1 Grand Prix at Silverston in England

As a child, what did you want to be when you grew up?

Detective

Most inspiring fictional character

Rocky Balboa or Atticus Finch

Related news and insights

Insights Photo

High Court listens to local designer, Katie Perry’s roar…

The High Court has today allowed Australian fashion designer Katie Jane Taylor (born Katie Jane Perry)’s appeal from the Full Court of the Federal Court of Australia in relation to her trade mark registration KATIE PERRY.
David Longmuir

11 March 2026

Insights Photo

High Court Puts Case To Bed

Phillips Ormonde Fitzpatrick Lawyers has successfully represented long-standing client, Bed Bath ‘N’ Table Pty Ltd (BBNT) in its appeal to the High Court of Australia as part of its long running dispute with Global Retail Brands Australia Pty Ltd (GBRA) following the launch of its House BED & BATH business.
David Longmuir

17 December 2025

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