Who we are

Global Expertise in Intellectual Property

At HP&P, we bring together a team of 12 fully qualified attorneys with extensive experience in intellectual property law, alongside 40 specialized technical counselors and patent translators. Our attorneys have a proven track record in handling complex IP matters, with two of them holding the title of European Patent Attorney.

As active members of leading national and international professional organizations, our attorneys contribute regularly to esteemed IP publications, both in Greece and globally, ensuring they stay at the forefront of industry developments.

Multilingual Support & Technical Expertise

We serve international clients in English, French, German, Spanish, and Italian, providing seamless communication and expert legal support. Our 40 technical counselors—many of whom hold postgraduate degrees in fields such as physics, chemistry, biochemistry, biology, and various engineering disciplines—bring a strong academic and research background to our practice.

With their deep technical knowledge and linguistic proficiency, they provide high-quality patent translations and consulting services in English, French, and German. Their expertise ensures precise and accurate handling of even the most complex technical and legal aspects of patents.

At HP&P, our global reach, multilingual capabilities, and technical excellence make us the trusted partner for protecting and managing intellectual property worldwide.

Diverse & Global Clientele

At HP&P, we serve a broad and distinguished client base, ranging from leading law firms to prestigious companies across various industries, including:

Pharmaceuticals & Biotechnology
Chemicals & Cosmetics
Construction & Telecommunications
Energy & Finance
Food, Beverages & Fashion
Education & Banking
...and many more.

Our clients include both large multinational corporations and smaller enterprises, working directly with HP&P’s expert trademark and patent attorneys or indirectly through trusted IP agents worldwide.

Global Reach & Strategic Partnerships

Beyond our intellectual property services in Greece, we have established strong collaborations with top-tier law firms in Cyprus and across the Arabic region. With years of experience managing trademarks and patents in these jurisdictions, we provide seamless, high-quality legal support tailored to our clients’ needs.

Additionally, our expansive global network of carefully selected IP law firms—built on trust and long-standing partnerships—enables us to efficiently manage international IP portfolios in every country where our clients’ interests extend.

At HP&P, we take pride in offering comprehensive, cross-border IP solutions, ensuring the protection and growth of your intellectual property worldwide.

Top-Ranked Intellectual Property Law Firm

At HP&P, we are committed to advancing intellectual property law in Greece and internationally. Our leadership in the field is demonstrated by our attorneys’ active roles in prestigious global IP organizations: Eva Yazitzoglou, Managing Partner, serves as a Council Member of the European Patent Institute (EPI). Miranda Theodoridou has served as a Council Member of ECTA. Maria Athanassiadou serves as a Delegate for the Greek Section of FICPI.

In addition, all HP&P attorneys are engaged members of leading international IP associations, including:

AIPPI (International Association for the Protection of Intellectual Property)
INTA (International Trademark Association)
FICPI (International Federation of Intellectual Property Attorneys)
PTMG (Pharmaceutical Trade Marks Group)
MARQUES (Association of European Trademark Owners)
CIOPORA (International Association of Breeders of Asexually Reproduced Horticultural Varieties)

Industry Recognition & Global Rankings

HP&P has been consistently maintaining its position as one of the leading intellectual property law firms in Greece for many years. Recognized with Tier 1/Gold Tier rankings for patents and trademarks by prestigious international legal publications, including Managing Intellectual Property Magazine (MIP) - IP Stars, WTR 1000, IAM Patent 1000, Legal 500, The World’s Leading Trademark Professionals, The World’s Leading Patent Professionals, Corporate INTL, and more, HP&P has earned its reputation as a trusted authority in the field.

The firm’s excellence was further underscored when it was named IP Firm of the Year in Greece at the 2024 Global IP Awards in London, hosted by IAM and WTR, marking a significant milestone in its distinguished history.

Additionally, members of HP&P’s legal team have been individually recognized as exclusive experts for Greece in the areas of Patent and Trademark Litigation, Patent and Trademark Law, Intellectual Property Law, Copyright, and Anti-Counterfeiting by prominent international legal guides such as Global Law Experts and Leaders-in-Law.

Despite our top ranking, we are continuously striving to further improve the quality and reliability of our services.

Commitment to Excellence & Quality Assurance

At HP&P, we continuously strive to enhance the quality, reliability, and efficiency of our services. As the first law firm of its kind in Greece to implement a quality control system (ISO 9001:2015), we ensure excellence in every aspect of our practice.

For more details, explore our website's Contributions, Awards and ISO 9001: 2015 sections.

Partners

Eva Yazitzoglou

European Patent Attorney, Attorney at Law

e_yazitzoglou@hplaw.biz

Eva Yazitzoglou, co-founder of Dr. Helen G. Papaconstantinou and Partners, Law Firm (HP&P), heads the firm as its Managing Partner, as from 2018.

Holding a law degree from the University of Athens, she is an Attorney at Law and a European Patent Attorney. With over 45 years of recognized professional experience in all aspects of IP law, Eva focuses on trademark, patent and copyright law, with particular emphasis on consultation, management and maintenance of international trademark and patent portfolios. Throughout her long career Eva has been advising several major international clients in all industry sectors, including the pharmaceutical, cosmetics, fashion and food industry. She has further worked closely with clients from almost all industry and commercial sectors and has successfully addressed various trademark and patent infringement cases involving individuals and companies in Greece, either by reaching out-of-court agreements and settlements or by proceeding to litigation.

Eva is member of the Athens Bar Association as of 1974 and is admitted to practice before the Supreme Court and the Council of State.

She is a Council Member of EPI for several years and an active member of many other reputable professional bodies, such as AIPPI and INTA.

Moreover, she has been ranked as a Recommended Individual in WTR Intellectual Property rankings from 2021 to 2024 as well as in IAM Patent 1000 rankings for 2024 and a Recommended Lawyer in Legal 500 EMEA – Intellectual Property rankings from 2020 to 2024. In addition, she has been rated as ‘Notable Practitioner’ in the IP STARS 2021 to 2024 Intellectual Property rankings as well as “unranked practitioner in the 2020-Intellectual Property rankings.

Eva makes significant contributions through various associations and prestigious IP resources.

Managing Partner

Miranda Theodoridou

European Patent Attorney, Attorney at Law
MBA, University of Derby

m_theodoridou@hplaw.biz

Miranda Theodoridou is one of the founding partners of Dr. Helen G. Papaconstantinou and Partners, Law Firm (HP&P), and heads the Trademark and the Anti-Counterfeiting Departments.

With almost 40 years of recognised experience in all IP matters, she represents major multinational companies before the higher administrative courts and in IP litigation, including offline and online enforcement and handling anti-counterfeiting cases. She also provides advise for all trademark, copyright, domain name and GDPR matters.

She holds a law degree from the University of Athens and an MBA from the University of Derby. She is a member of the Athens Bar since 1980 and she is admitted to practice before the Supreme Court and the Council of State.

Moreover, she has served as a council member of the European Communities Trademarks Association from 2014 to 2022 and is a member of the Institute of Professional Representatives before the European Patent Office, the International Association for the Protection of Intellectual Property and INTA.

Miranda has been consistently ranked as a Recommended Individual in WTR 1000 Intellectual Property rankings for the years 2020 - 2024, a Recommended Lawyer in Legal 500 EMEA – Intellectual Property 2021 - 2024 rankings as well as a Trade mark Star and Patent Star for the years 2020 – 2024 in the IPSTARS rankings. She has also been mentioned a recommended individual in the 2024 IAM PATENT 1000 rankings. In 2020 she was also one of the Top 250 Women in the IP STARS 2020 – Intellectual Property rankings.

Miranda makes significant contributions through various associations and prestigious IP resources.

Deputy Managing Partner

Maria Athanassiadou

Attorney at Law

m_athanasiadou@hplaw.biz

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.

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).

Various recent awards/recognitions she has received include:

Recommended Individual in IAM 1000 – World’s Leading Patent Professionals, since 2020
Leading Individual by Legal 500 EMEA 2021 to 2024-Intellectual Property
Trade mark star in Intellectual Property rankings in IP STARS 2021 to 2024
Awards winner for 2021 and 2022 on Patent Law in Greece by Leaders-in-Law and on Patent Litigation by Global Law Experts and exclusive recommended expert for 2023
Award winner and exclusive recommended expert for 2023 on Patents Law in Greece by Advisory Excellence

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.

Senior Partner