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Finnegan
Jin Ooi
Partner
More
vCard
  • 1 London Bridge
  • London, United Kingdom SE1 9BG
+44 20 7864 2821
jin.ooi@finnegan.com jin.ooi@finnegan.com

Jin Ooi

Partner

  • +44 20 7864 2821 +44 20 7864 2821
  • jin.ooi@finnegan.com jin.ooi@finnegan.com
  • 1 London Bridge
  • London, United Kingdom SE1 9BG
  • vCard

Jin Ooi focuses on high-stakes intellectual property (IP) litigation, with a particular emphasis on complex, multi-jurisdictional patent disputes in the life sciences, technology, and consumer products sectors. Clients benefit from Jin’s dual scientific and legal training, which enables him to engage deeply with technical subject matter and develop effective litigation strategies aligned with regulatory and commercial considerations. He is widely recognized for his sophisticated approach to litigation, advocacy skills, and ability to navigate technically demanding disputes involving cutting-edge innovations. 

Jin represents clients in patent litigation, damages inquiries, trade secrets disputes, and related regulatory and competition matters, frequently coordinating such proceedings across multiple jurisdictions. His work has involved pharmaceuticals, biotechnology, and medical devices and advanced technologies, including biologics and biosimilars, DNA sequencing, vaccines, transgenic platforms, cochlear implants, and reduced-risk consumer products. 

 

Jin has extensive experience litigating some of the most significant patent cases in the United Kingdom and beyond, with multiple matters reaching the UK Supreme Court and Court of Appeal. His work includes representing major pharmaceutical companies in landmark disputes over blockbuster drugs, as well as securing interim injunctions and defending patent validity against coordinated generic challenges. 

 

Jin’s litigation experience includes leading complex damages inquiries, most notably a widely recognized follow-on damages case arising from cross-undertakings in pharmaceutical patent proceedings, described as one of the most complex cases ever before the UK Patents Court. He has also been involved in many of the leading cases on interim license declarations in the Fair, Reasonable, and Non-Discriminatory (FRAND) space involving standard essential patents (SEPs).

 

Jin’s experience with trade secrets arbitration and disputes includes matters in the aerospace, aviation, and heavy industry sectors. He often works at the intersection of IP and commercial litigation issues, including contractual and regulatory disputes. Jin brings experience in life sciences regulatory advice matters and related transactional work, including support for mergers and acquisitions in regulated industries.

 

Jin is consistently recognized by leading directories for his litigation capabilities, strategic thinking, and technical insight. His cases have been featured in The Lawyer’s “Top 20 Cases”, and he is ranked by Intellectual Asset Management (IAM), Chambers UK, and The Legal 500 UK as a leading practitioner in patent litigation and life sciences disputes.

 

Insights

Webinar

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July 8, 2026

Webinar

Professional Recognition

“Jin skilfully coordinates complex, multi-jurisdictional patent disputes. He confidently manages litigation strategies across different countries, ensuring alignment between legal teams, and adapting approaches to address jurisdiction-specific challenges. Jin has a deep understanding of his clientele and their key interests, and is remarkable in his ability to adapt to evolving situations while maintaining a focus on achieving a favourable outcome.”

Intellectual Asset Management Patent 1000

"Jin Ooi is another of the set’s seasoned litigators who comes in for high praise: ‘Jin is an incredibly bright lawyer with a sharp legal mind who works efficiently in high-pressure situations and never loses sight of the customer’s commercial needs. He immediately grasps the essence of the problem in front of him to provide excellent guidance, and is responsive around the clock.’ He performs particularly well when faced with intricate legal problems and has worked … in an incredibly complex liability and quantum trial in which they secured an overwhelmingly positive result for the company.”

Intellectual Asset Management Patent 1000

“Jin is a rising star in global patent litigation. His work inspires confidence – his approach is consistent and delivers information and advice swiftly. He is responsive, organised, understands new technologies quickly and has a deep understanding of both legal and technical aspects. Jin is an exceptionally smart patent expert. He stands out particularly for his great judgement and insight. He delivers solid strategy and is exceptional in coordinating legal matters across multiple jurisdictions.”

Intellectual Asset Management Patent 1000

“Ooi is equally strong in the pharmaceutical field but covers consumer products too - he has been credited with having ‘an attention to detail that is second-to-none’, ‘I always trust Jin to get to the heart of the technical aspects of a matter, and to do so without delay. This is the hallmark of excellent lawyers, and in Jin’s case this talent is coupled with an interest in understanding how the law varies in other jurisdictions. That is a talent which is imperative to overseeing and coordinating multi-jurisdiction patent litigation and one that clients value in Jin.'"

Intellectual Asset Management Patent 1000

"... named as 'one to watch' in UK patent litigation: an 'all-rounder', Jin 'stands out for the technical diversity of his cases, from pharmaceuticals to mobile communications to e-cigarettes - as well as his hard work and tenacity.'”

JUVE Patent

“Working across both pharmaceuticals – where he concentrates on advancements in small molecules and vaccines – and consumer goods is Jin Ooi, who can swiftly resolve even the most complex damages enquiries. He assisted [...] on the Pfizer piece and directed patent infringement and revocation proceedings on behalf of British American Tobacco across 25 jurisdictions worldwide.”

Intellectual Asset Management Patent 1000

“Jin skilfully coordinates complex, multi-jurisdictional patent disputes. He confidently manages litigation strategies across different countries, ensuring alignment between legal teams, and adapting approaches to address jurisdiction-specific challenges. Jin has a deep understanding of his clientele and their key interests, and is remarkable in his ability to adapt to evolving situations while maintaining a focus on achieving a favourable outcome.”

Intellectual Asset Management Patent 1000

"Jin Ooi is another of the set’s seasoned litigators who comes in for high praise: ‘Jin is an incredibly bright lawyer with a sharp legal mind who works efficiently in high-pressure situations and never loses sight of the customer’s commercial needs. He immediately grasps the essence of the problem in front of him to provide excellent guidance, and is responsive around the clock.’ He performs particularly well when faced with intricate legal problems and has worked … in an incredibly complex liability and quantum trial in which they secured an overwhelmingly positive result for the company.”

Intellectual Asset Management Patent 1000

“Jin is a rising star in global patent litigation. His work inspires confidence – his approach is consistent and delivers information and advice swiftly. He is responsive, organised, understands new technologies quickly and has a deep understanding of both legal and technical aspects. Jin is an exceptionally smart patent expert. He stands out particularly for his great judgement and insight. He delivers solid strategy and is exceptional in coordinating legal matters across multiple jurisdictions.”

Intellectual Asset Management Patent 1000

“Ooi is equally strong in the pharmaceutical field but covers consumer products too - he has been credited with having ‘an attention to detail that is second-to-none’, ‘I always trust Jin to get to the heart of the technical aspects of a matter, and to do so without delay. This is the hallmark of excellent lawyers, and in Jin’s case this talent is coupled with an interest in understanding how the law varies in other jurisdictions. That is a talent which is imperative to overseeing and coordinating multi-jurisdiction patent litigation and one that clients value in Jin.'"

Intellectual Asset Management Patent 1000

"... named as 'one to watch' in UK patent litigation: an 'all-rounder', Jin 'stands out for the technical diversity of his cases, from pharmaceuticals to mobile communications to e-cigarettes - as well as his hard work and tenacity.'”

JUVE Patent

“Working across both pharmaceuticals – where he concentrates on advancements in small molecules and vaccines – and consumer goods is Jin Ooi, who can swiftly resolve even the most complex damages enquiries. He assisted [...] on the Pfizer piece and directed patent infringement and revocation proceedings on behalf of British American Tobacco across 25 jurisdictions worldwide.”

Intellectual Asset Management Patent 1000

News

Award/Ranking

Finnegan’s European Practices and Attorneys Highlighted in 2026 Managing IP Rankings Finnegan’s European Practices and Attorneys Highlighted in 2026 Managing IP Rankings

June 25, 2026

Managing Intellectual Property

Award/Ranking

Six Finnegan Partners Recognized in the 2026 Lawdragon 500 Leading Global IP Lawyers Six Finnegan Partners Recognized in the 2026 Lawdragon 500 Leading Global IP Lawyers

June 22, 2026

The Lawdragon 500: Leading Global IP Lawyers

Commentary

Finnegan Taps Partner from Kirkland to Boost IP Team Finnegan Taps Partner from Kirkland to Boost IP Team

June 12, 2026

Law360

Media Mention

Finnegan Hires Kirkland & Ellis Litigator for London Office Finnegan Hires Kirkland & Ellis Litigator for London Office

June 8, 2026

JUVE Patent

Commentary

Finnegan Hires Kirkland Partner as It Eyes UK Growth Finnegan Hires Kirkland Partner as It Eyes UK Growth

June 8, 2026

Managing Intellectual Property

Press Release

London-Based Life Sciences Litigator Jin Ooi Bolsters Finnegan’s Global IP Litigation Capabilities London-Based Life Sciences Litigator Jin Ooi Bolsters Finnegan’s Global IP Litigation Capabilities

June 8, 2026

Professional Activities

  • International Association for the Protection of Intellectual Property (AIPPI)
  • European Patent Lawyers Association (EPLAW)
  • The Law Society of New South Wales (Australia)
Admissions and Education

Admissions

  • Senior Courts of England and Wales
  • New South Wales (Australia)

Education

University of Oxford
Postgraduate Diploma, Intellectual Property Law and Practice, 2016
College of Law, Sydney
Graduate Diploma, Legal Practice, 2011
University of Sydney
LL.B.,

First Class Honours, 2010

University of Sydney
B.Sc., Pharmacology (Advanced), 2008

Languages

  • Malay

Jin's Practices

Appeals, Issues, and Legal Strategy
Patent Oppositions and Appeals
Diligence, Licensing, and Opinions
Due Diligence
Freedom to Operate Opinions
Opinions and Counseling
Patent Mining and Mapping
Standard Essential Patents (SEPs)
Global IP Enforcement, Litigation, and Trials
Arbitration and Other ADR
Patent Litigation and Trials
Pretrial Strategies
Trade Secrets
Unitary Patent System (UPS) and the Unified Patent Court (UPC)

Jin's Industries

AI, Electronics, and Information Technology
Artificial Intelligence (AI) and Machine Learning (ML)
Electronic Devices and Components
Robotics
Chemicals, Industrials, and Materials
Chemical
Manufacturing
Consumer Goods and Services
Consumer Products
Life Sciences
Biologics
Biotechnology
Medical Device and Diagnostics
Pharmaceutical
Transportation and Logistics
Aerospace, Aviation, and Unmanned Aerial Systems (UAS)

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