Maria Athanassiadou

About the LawyerMaria Athanassiadou is an Attorney at Law and a founding partner of Dr. Helen G. Papaconstantinou and Partners, Law Firm (HP&P-2015). With nearly three decades of expertise across all realms of intellectual property, she spearheads the Patents and Industrial Designs Department of the firm. Maria's practice revolves around IP litigation, prosecution, and counseling, with a specialized focus on patents, utility models, supplementary protection certificates, industrial designs, and trademarks. She excels in drafting and reviewing IP contracts and providing pertinent consultancy services.Maria's clientele comprises major international entities and local clients, particularly in the pharmaceutical sector. She adeptly assists them in devising and executing strategies tailored to their business objectives and needs.Holding a law degree from the University of Athens, Greece, and a master's in Spanish studies from the University of Barcelona, Spain, Maria boasts a comprehensive educational background. Since 1996, she has been a member of the Athens Bar Association and is licensed to practice before the Supreme Court and the Council of State.Maria actively contributes to various professional organizations, serving as an alternate delegate of the International Federation of Intellectual Property Attorneys (FICPI) Greek National Group. She is also a valued member of the Pharmaceutical Trademarks Group (PTMG) and the International Trademark Association (INTA).Maria is a regular contributor to several significant trademark, patent and industrial designs publications, including Lexology, IAM, World Trademark Review, Wolters Kluwer Manual IP, Katzarov’s Manual on Industrial Property and several INTA resources as well as author of the Greek chapter of “European SPCs Unraveled (2nd edition, Wolters Kluwer).She is fluent in English, Spanish and Greek (native language) and has a good knowledge of German and Italian.ExperienceMaria Athanassiadou has nearly three decades of expertise in intellectual property law, with more than 25 years focused on IP litigation, prosecution, and counseling. She has been a member of the Athens Bar Association since 1996 and serves as senior partner at the firm.SpecialtyMaria Athanassiadou specializes in intellectual property law, with a focus on patents, utility models, supplementary protection certificates, industrial designs, and trademarks. Her practice includes IP litigation, prosecution, counseling, drafting and reviewing IP contracts, and providing consultancy services, particularly for clients in the pharmaceutical sector.EducationMaria Athanassiadou holds a law degree from the University of Athens, Greece, and a master's in Spanish studies from the University of Barcelona, Spain. She has been a member of the Athens Bar Association since 1996 and is licensed to practice before the Supreme Court and the Council of State.Achievements and Recognition

• Leading Individual by Legal 500 EMEA – Intellectual Property (2021-2025)
• Recommended Individual in IAM 1000 – World's Leading Patent Professionals (since 2020)
• Patent Litigation Lawyer of the Year in Greece – Corporate INTL Global Awards 2025
• Shortlisted as Practitioner of the Year for Greece – Managing IP EMEA Awards 2025
• Trade mark star in Intellectual Property rankings – IP STARS (2021-2024)
• Senior Partner and Founding Partner – Dr. Helen G. Papaconstantinou and Partners Law Firm (established 2015)
• Head of Patents and Industrial Designs Department – Dr. Helen G. Papaconstantinou and Partners Law Firm
• Author of Greek chapter – “European SPCs Unraveled” (2nd edition, Wolters Kluwer)
• Regular contributor to major IP publications – Including Wolters Kluwer Manual IP, Lexology, IAM, World Trademark Review, Katzarov's Manual on Industrial Property, and INTA resources
• Member of professional organizations – Alternate delegate of International Federation of Intellectual Property Attorneys (FICPI) Greek National Group; member of Pharmaceutical Trademarks Group (PTMG) and International Trademark Association (INTA)
• Licensed to practice before the Supreme Court and Council of State – Athens Bar Association member since 1996