Dr. Helen G. Papaconstantinou and Partners

Patents and Industrial Designs Department

Senior Partner

Maria 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.

Most recent awards/recognitions include:

Leading Individual by Legal 500 EMEA 2021-2025 - Intellectual Property 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 by Managing IP Awards 2025 EMEA Trade mark star in Intellectual Property rankings in IP STARS 2021-2024

Maria is author of the Greek chapter of “European SPCs Unraveled (2nd edition, Wolters Kluwer) as well as a regular contributor to several significant patent, trademark and industrial designs publications, including Wolters Kluwer Manual IP, Lexology, IAM, World Trademark Review, Katzarov’s Manual on Industrial Property and several INTA resources.  More authorship information at https://www.hplawfirm.com/about-us/our-people/item/98-maria-athanassiadou.

Greek, English, Spanish, French, German

Alternate delegate of the International Federation of Intellectual Property  Attorneys (FICPI) Greek National Group

Member of the Pharmaceutical Trademarks Group (PTMG)

Member of International Trademark Association (INTA)

Athens Bar Association, as from 1996

Masters’ degree in Spanish studies, University of Barcelona, 2018

Law Degree, University of Athens, Greece, 1994