JUVE Patent

Jin Ooi is a partner in Kirkland’s Intellectual Property Litigation Team in London. He is experienced in patent litigation and counselling (including on complex damages inquiries). He has worked on matters in the pharmaceutical, chemistry, biotech and life sciences fields (second medical use, biologics/biosimilars, small molecules, DNA sequencing, vaccines, transgenic animal platforms for antibody discovery), in the medical device space (cochlear implants, bone cements), and in the FMCG and consumer products sector (reduced-risk products including tobacco heating products and e-cigarettes, shaving razors, dishwashing tablets, coffee pods and capsules).

He has been involved in all of the leading cases on interim licences and declarations thereof in the FRAND space (Xiaomi; Lenovo; Samsung). He is also experienced in arbitrating trade secrets disputes in the tech (LNG carriers) and aviation sector (airplane components, airport businesses), in addition to litigating antitrust claims and jurisdiction challenges (cathode ray tubes, lithium ion batteries, forklift gas).

His clients have included Astellas, Boehringer Ingelheim, British American Tobacco, Pfizer, Viatris, Advanced Bionics, Novartis, Regeneron and Samsung. Jin’s cases are often multi-jurisdictional requiring significant cross-border coordination across multiple forums. In the UK, Jin’s cases have reached the Court of Appeal (Warner-Lambert (x3), BAT (x2), Xiaomi, Lenovo, Samsung) and the Supreme Court (Warner-Lambert, Regeneron).

• The Legal 500 UK (2026) noted: “Jin Ooi, praised for ‘combin(ing) deep technical knowledge with strategic thinking’. Jin Ooi is a brilliant mind who guides the team effectively and is wonderful to work with. … Excellent on disputes with multi-national dimensions.”
• Chambers UK (2026) noted: “What impressed me most about Jin was his advocacy skills. … Jin Ooi has an exceptional attention to detail that truly sets him apart. Every aspect of the case was meticulously analysed, and he is incredibly well-versed in the facts of the case.”
• JUVE Patent (2022) named him 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.”
• IAM Patent 1000 (2025) noted: “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.”

Prior to joining Kirkland, Jin worked at Allen & Overy LLP in London and before that Corrs Chambers Westgarth in Sydney. In recognition of his work in Australia, Jin was among a select few young lawyers awarded the 2014 Lawyers Weekly 30 Under 30 Awards, and a finalist in two categories in the 2015 Awards. His dual qualifications in law (1st class degree) and pharmacology give him a special insight into, and understanding of, his clients’ legal needs and commercial and regulatory imperatives.