Greece

Firm overview

Established over a century ago, Dr. Helen G. Papaconstantinou and Partners ("HP&P") stands as a cornerstone in the intellectual property (IP) law sector of the country. Renowned internationally for its high quality services, HP&P offers comprehensive legal and business solutions throughout the entire IP lifecycle. From advising on and prosecuting IP portfolios to managing and maximizing the value of intellectual property in commercial and licensing transactions, the firm excels in out-of-court negotiations, settlement, IP litigation, and enforcement strategies. HP&P seamlessly blends its global perspective with an in-depth understanding of the Greek legal and business landscape.

Setting itself apart through its vast experience and expertise across the spectrum of IP services, HP&P is committed to problem-solving and achieving tangible results. Pioneering in its field, HP&P was the first law firm of its kind to implement a quality control system (ISO 9001/2015).

The firm's leadership comprises three distinguished partners: Eva Yazitzoglou as the Managing Partner, alongside Miranda Theodoridou and Maria Athanassiadou.

HP&P boasts a team of 12 fully qualified lawyers, each possessing extensive experience in all IP matters acquired over years of dedicated practice. Two attorneys are European patent attorneys, one is trained and certified by the EUIPO (first edition), while all members of the firm are part of the Athens Bar Association. Additionally, the firm benefits from the invaluable expertise of a highly specialized academic serving as Counsel, as well as a knowledgeable and experienced legal consultant. Supported by 20 proficient paralegals and supporting staff, HP&P delivers excellent legal and administrative services and collaborates closely with 40 technical counselors covering all technical fields. These counselors, equipped with accredited degrees and significant research experience, also serve as competent translators for English, French, and German, offering consulting services of the highest quality in patent matters.

HP&P serves its diverse clientele in Greek, English, French, German, Spanish, and Italian, maintaining registration with the Athens Bar Association and membership in the Greek Association of Law Firms.

Actively engaged in promoting IP matters both domestically and internationally, HP&P attorneys hold 
memberships in various esteemed international associations, including EPI, FICPI, ECTA, AIPPI, INTA, PTMG, and MARQUES. Notably, Managing Partner Eva Yazitzoglou has served as a Council Member of EPI from 2008 to 2026, while Maria Athanassiadou represents the Greek National Group of FICPI as a Delegate since 2022. Miranda Theodoridou served as a Council Member of ECTA from 2014 to 2022.

The contributions of HP&P attorneys to significant and globally recognized IP resources, such as the World Trademark Review, IAM, Wolters Kluwer Manual IP, Katzarov's Manual on Industrial Property, and various INTA and ECTA resources, further underscore the firm's eminence in the field.

Finally, HP&P is constantly ranked among the top IP law firms in Greece by international legal directories and associations, indicatively mentioning: IP STARS – Trademarks and Patents, Legal 500, Corporate INTL, WIPR Leaders, WTR1000 – Recommended Firm and Recommended Individual, IAM Patent 1000 – Recommended Firm, The Trademark Lawyer, The Patent Lawyer, Global Law Experts (GLE) and Global Advisory Experts (GAE) and others and have received various awards in the IP field.

Members of the firm have also been endorsed as the exclusive Patent Law Expert, Copyright law expert and Anticounterfeiting law expert for Global Law Experts (GLE) and Global Advisory Experts (GAE) and have received related awards.

Despite its top ranking, HP&P is continuously striving to further improve the quality and reliability of its services and enhance its strongly actively inclusive working ethos that encourages collaboration as the main driving force behind effective leadership and successful results. Our vision is to keep on incorporating new practice areas and opportunities so that we can continue to adapt to the growing and ever-changing needs of our clients and the legal industry.

Firm overview

Established in 1951, KIORTSIS & ASSOCIATES Law Offices is specialized in all aspects of Intellectual property and is well known for its high level of expertise in addition to its extensive legal experience.

Our Offices are equally competent in IP filings, litigation, contracts and negotiation, as well as in legal consulting. They maintain a very strong international clientele, which consists of small to large companies as well as local and foreign individuals. Moreover, KIORTSIS & ASSOCIATES Law Offices co-operate with prominent and trustworthy law firms on an international level, which enable us to offer comprehensive legal services to clients with international business interests.

Our experience of over 70 years, high level of education, continuous awareness of the latest developments in Intellectual Property Law through webinars, studies, articles, etc. together with our state - of - the - art equipment help us to provide our clients with the best available services in Greece and within the European Union. Furthermore, Kiortsis & Associates Law Offices monitors and ensures its active compliance with the spirit of the law and ethical standards with the aim of increasing long-term profits and reducing business and legal risk.

We are very happy that International Law Firms’ Guides, such as “The Legal 500”, Law Firm Directories and Legal Magazines have been continuously ranking Kiortsis & Associates Law Offices over the years in high positions among the leading IP firms.

Firm overview

We are in the top of Greece’s legal practice, with a 160+ member team comprising of 15 partners, 80+ associates, 20+ trainees and specialized business services professionals. We deliver a seamless blend of individual expertise with the strength of a collective powerhouse, our biggest asset.

Recognized as a leader across all practice areas, we are celebrated for our commercial insight and dedication to client relationships. Our lawyers are known for their quality, innovation and determination, earning trust through a deep understanding of each case, business integrity, and a focus on tailored solutions.

We uphold the highest professional and ethical standards. We value collaboration and respect, and a deep and unwavering belief in equal opportunity drives our culture. Further, our commitment to the community is unwavering. Pro bono efforts span immigration, education, cultural heritage, environmental protection and democracy promotion, with the aim of dedicating 2% of our chargeable hours to these causes.

As one of Greece’s leading law firms, we are consistently ranked among the top by all major legal directories, including Chambers, Legal 500, and IFLR1000. We have been named Greece’s Law Firm of the Year by IFLR in 2025 and have received the same distinction from Chambers on six occasions (2012, 2014, 2020, 2021, 2023, 2025). At POTAMITISVEKRIS, we see beyond and deliver impact.

Firm overview

KG Law Firm provides a full-service intellectual property (IP) practice representing Greek and international clients across the entire spectrum of IP law. With deep-rooted expertise in trademark, copyright, design, patent, domain name, and unfair competition matters, the firm has built a strong track record serving clients in the financial, pharmaceutical, cosmetics, beverages, and technology sectors. The team's trademark practice is at the core of 
the firm. 

KG's team offers comprehensive trademark support, from clearance searches and filings at national, 
European, and international level, through prosecution, oppositions, revocation, and invalidity actions, to representation before the Greek courts, the Trademark Administrative Committee and the EUIPO. 

The firm also advises on the strategic management and maximization of trademark portfolios, ensuring the proper management of clients' IP assets. This is complemented by substantial experience in IP transactions, licensing, negotiation, and due diligence. In terms of copyright law, KG provides both advisory and litigation services, with a particular focus on software-related matters, whereas the firm's patent practice covers the filing, registration, and 
validation of European patents, as well as patent litigation, while its design practice extends to design filings and related court proceedings. 

KG also represents clients before the Greek Customs Authorities and in proceedings arising from the seizure of counterfeit goods. Additional services include domain name registration and dispute 
resolution, as well as consulting on trade secret protection. Across all IP areas, KG is committed to delivering forward thinking and commercially sound legal solutions tailored to each client's specific needs and business objectives. The team combines rigorous legal expertise with a results-oriented approach, ensuring clients receive not only technically sound advice, but also strategic guidance grounded in commercial reality.

Whether navigating complex multi-jurisdictional disputes, managing large IP portfolios, or advising on sensitive transactions, KG stands out as a trusted partner in terms of IP matters.