POLAND Law and Practice Contributed by: Krystyna Szczepanowska-Kozłowska, Marcin Ziarkowski, Krzysztof Popławski and Kacper Sobolewski, A&O Shearman
A&O Shearman was formed in 2024 via the merger of two historic firms, Allen & Overy and Shearman & Sterling, and is a fully integrated elite global firm with nearly 4,000 lawyers, including around 800 partners working across over 47 offices in 29 countries. A&O Shearman has the depth of experience and diver ‑ sity of talent to operate at the forefront of business across every industry sector, market, and geography. The firm’s strength comes from its global capabilities and unyielding standard of excellence, supported by deep local roots, relationships, experience, and
knowledge. A&O Shearman’s Poland team features over 70 lawyers. The IP practice in Warsaw is focused mainly on IP litigation, with special attention paid to patent litigation. However, the firm has also built a stable transactional and advisory, non-contentious IP practice. It advises on some of the most technically complex and commercially important litigation cas ‑ es, as well as market-shaping transactions. In patent litigation, A&O Shearman handles most of the major disputes in Poland.
Authors
Krystyna Szczepanowska- Kozłowska is a partner at A&O Shearman, heading the firm’s IP and commercial litigation department. She
Krzysztof Popławski is an advocate and an associate in the IP and commercial litigation department at A&O Shearman. He advises on a wide range of commercial issues, including IP, M&A and arbitration. Krzysztof has
is an attorney-at-law with over 30 years of experience, and provides clients with cutting-edge advice on a wide range of IP issues relating to patents, trade marks and copyrights, both contentious and non-contentious. Krystyna advises on a wide range of complex cases, working with both national and international clients on high-profile and strategic matters. She represents major international companies in their high-profile and exceptionally complex patent and trade mark disputes, which require a significant amount of technical expertise. Additionally, she is a professor and author of numerous publications in the field.
been involved in high-profile IP, M&A, real estate court and patent invalidation proceedings, as well as arbitration disputes.
Kacper Sobolewski is an associate in the IP and commercial litigation department at A&O Shearman. Kacper graduated from the Faculty of Law at the University of Warsaw in 2022, and he is currently doing his
advocate traineeship at the Warsaw Bar Association. With his experience involving commercial and patent invalidation disputes, Kacper aims to become a versatile litigator. In 2023, he was admitted to the Doctoral School of Social Sciences of the University of Warsaw, where he is now also pursuing a PhD in administrative law.
Marcin Ziarkowski is an advocate and senior associate in the IP and commercial litigation department at A&O Shearman, with nearly a decade of experience specialising in intellectual property matters,
particularly patents and copyrights. He is actively involved in a wide range of patent invalidation proceedings and patent litigation, especially within the pharmaceutical and telecommunications sectors. Marcin develops litigation strategies and represents clients before the Polish Patent Office, the IP court, and administrative courts.
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