Maria Athanassiadou

Maria Athanassiadou is a deputy managing partner of Dr. Helen G. Papaconstantinou and Partners (HP&P), one of Greece's foremost intellectual property firms, and head of its Patents and Industrial Designs Department. Based in Athens, she was named Patent Litigation Lawyer of the Year in Greece at the Corporate INTL Global Awards 2025, a distinction that reflects her standing as one of the country's leading practitioners in patent disputes and her long record of advising innovators on the protection and enforcement of their technology.

A founding partner of the firm in its present structure since 2015, Ms Athanassiadou leads a practice devoted to patent litigation, prosecution and counselling. Her expertise spans patents, utility models, supplementary protection certificates, industrial designs and trademarks, and she is regularly engaged on the contentious matters that sit at the heart of patent practice, where questions of validity, infringement and enforcement carry substantial commercial consequences for the businesses involved. Patent litigation demands a rare combination of legal skill and technical fluency, and Ms Athanassiadou brings to it both the analytical rigour of an experienced litigator and a command of the procedural framework before the Greek courts.

Her qualifications reflect a career built on strong academic and professional foundations. She holds a law degree from the University of Athens and a master's degree in Spanish studies from the University of Barcelona, and she has been a member of the Athens Bar Association since 1996, licensed to appear before the Supreme Court and the Council of State. She is a delegate of the Greek National Group of the International Federation of Intellectual Property Attorneys (FICPI) and a member of the Pharmaceutical Trademarks Group (PTMG) and the International Trademark Association (INTA). She works in Greek, English and Spanish, and also has a good command of German and Italian, an unusually broad linguistic range that supports her cross-border patent and trademark work.

Ms Athanassiadou's reputation is confirmed by consistent recognition from the leading independent directories. She has been recommended in IAM 1000 from 2020 to 2026, named a Leading Individual by Legal 500 EMEA from 2021 to 2026, and recognised as Patent Litigation Lawyer of the Year in Greece across 2025 and 2026. Together these endorsements underline the sustained quality of her practice and her position at the front rank of Greek patent lawyers.

HP&P brings more than a century of history to its clients and is dedicated exclusively to intellectual property, covering patents, trademarks, utility models, industrial designs, supplementary protection certificates, copyright, litigation and anti-counterfeiting, alongside related commercial and advisory services across some eighteen practice areas. Its attorneys are active members of the leading international IP associations, and the firm coordinates IP strategies for clients from inception through to dispute resolution, supported by an international network of partner firms. As head of its patents practice and a member of its senior leadership, Ms Athanassiadou is central to the firm's ability to protect and enforce the technological assets of its clients, and her award marks her out as one of the most accomplished patent litigators practising in Greece today.