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Patent and Trade Marks Attorney, Lawyer

David Longmuir, Partner
Phillips Ormonde Fitzpatrick Lawyers

David began his career with Phillips Ormonde Fitzpatrick Lawyers in 2003 as an articled clerk, and was admitted to practice as a barrister and solicitor of the Supreme Court of Victoria and the Federal and High Courts of Australia in 2004. He was subsequently registered as a trade marks attorney in 2006 and a patent attorney in 2007.

David gained First Class Honours in Science through the Department of Paediatrics with a project at the Murdoch Children’s Research Institute, and worked for three years as a Research Assistant in the Department of Epidemiology and Preventive Medicine at Monash University.

David works in all areas of intellectual property (IP) litigation and has experience in patent, designs, copyright, trade marks and trade practice matters. He has a particular interest in life sciences, and has been involved in major patent litigation in the chemical, biotechnology and pharmaceutical areas.

David also has experience in relation to non-contentious IP work and is involved in brand protection, as well as opposition matters before the Patent and Trade Marks Office.

David has been recognised as a leading practitioner in both IAM Patent 1000 2020 and WTR 1000 2020.




Registered Australian and New Zealand Patent Attorney, 2007.
Master of Laws (Intellectual Property), Monash University, 2007
Registered Australian Trade Marks Attorney, 2006
Legal Practicing Certificate, 2004
Bachelor of Science (Hons), University of Melbourne, 2003
Bachelor of Laws (Hons), University of Melbourne, 2003


The Institute of Patent and Trade Mark Attorneys of Australia (Fellow)
The Intellectual Property Society of Australia and New Zealand Inc.
The Australian Corporate Lawyers Association
Law Institute of Victoria

Service location


Service areas

Legal Services, Plant Breeder's Rights/Variety Rights


Enforcement and Dispute Resolution
Domain Names
Life Sciences
Plants and Agriculture


Brand Protection