With a strong focus on pharmaceutical clients, Dr. Helen G. Papaconstantinou and Partners is well placed to handle patent litigation, infringement, and pre‑litigation matters. The team has notable experience before the Greek Patent Office, the Athens Single‑Member Court of First Instance, and the Council of State. Recognised for being ‘particularly skilled at navigating cross‑border and EU‑level procedures’ and praised for its ’deep legal expertise with a modern, client‑focused mindset’, the practice is co‑headed by Eva Yazitzoglou, who handles patent and trademark infringement cases, and Miranda Theodoridou, who focuses on trademark and IP litigation. Maria Athanassiadou brings extensive expertise in patent prosecution, infringement, and opposition proceedings.
Legal 500 Editorial commentary
Accolades
Client satisfaction: Lawyer & team quality
Client satisfaction: Billing & efficiency
Client satisfaction: Sector knowledge
Testimonials
Collated independently by Legal 500 research team.
- ‘The team at Dr. Helen G. Papaconstantinou & Partners stands out as one of the most accomplished and specialised intellectual property practices in Greece. Their combination of deep academic knowledge and practical understanding of IP enforcement, prosecution, and litigation makes them a clear leader in the market. The group operates with exceptional coordination, ensuring that every case—whether involving trademarks, patents, or designs—is handled with precision and strategic foresight.'
- ‘Dr. Helen G. Papaconstantinou and Partners is our go-to firm for Greek patent work including high-value cases including SPCs. The team is professional and responsive.’
- ‘Maria Athanassiadou has impressed me in every case we have worked on together. She is always first to respond when sending out instructions across Europe.’
- ‘The IP team at Dr. Helen G. Papaconstantinou and Partners combines deep legal expertise with a modern, client-focused mindset. The firm stands out for its comprehensive handling of trademarks, patents, and designs, its strong litigation record, and its ability to manage complex, cross-border IP portfolios. Clients value the team’s responsiveness, strategic thinking, and precision. What truly differentiates the practice is its blend of legal excellence, technological awareness, and collaborative culture.’
- ‘They combine exceptional technical expertise with genuine commitment and integrity. What makes the team different from competitors is its blend of academic depth and real-world efficiency, and a culture of collaboration, trust, and professionalism. I have especially valued their clarity, reliability, and ability to deliver consistently excellent results under demanding circumstances.’
Lawyers
Leading partners
The strongest partners in their field, leading on market-leading deals and endorsed by peers and clients alike.
Practice head
Eva Yazitzoglou; Miranda Theodoridou
Other key lawyers
Maria Athanassiadou