Dr. Helen G. Papaconstantinou and Partners

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.

Recognition

Consistently ranked among the top IP law firms in Greece by international legal directories and associations, HP&P continues to garner accolades for its unwavering commitment to excellence and innovation.

• • Corporate INTL– Global Awards Winner - IP Litigation Law Firm of the Year in Greece, 2026
  • Corporate INTL– Global Awards Winner - IP Law Firm of the Year in Greece, 2026
  • Legal 500 EMEA – ranked Top-tier in Intellectual Property in Greece
  • Managing IP Awards 2026 EMEA – Greece – Shortlisted for Firm of the Year
  • WTR 1000 2026– Recommended Firm (Gold)
  • 2025 Global Law Experts Annual Awards – IP Litigation Law Firm of the Year in Greece
  • IAM Patent 1000 – Recommended Firm (Gold), 2025
  • IP STARS – EMEA – 2025 - Greece –Tier 1 - Intellectual Property
  • Managing IP Awards 2025 EMEA – Winner – Greece Firm of the Year
  • The Patent Lawyer Magazine– Award Winning Law Firm - Greece, 2025
  • The Trademark Lawyer Magazine– Award Winning Law Firm - Greece, 2025

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.

Practice Areas

• • Patents
  • Trademarks
  • SPC’S
  • Utility Models
  • Industrial Designs
  • Foreign Jurisdictions
  • Copyright
  • Litigation
  • Anti-Counterfeiting / Border Seizure / Customs Enforcement
  • Internet
  • E-Commerce and Domain Names
  • Competition Law
  • Advertsing / Consumer Protection
  • Contracts / Agreements
  • Consultancy
  • Licensing
  • Plant Breeders’ Rights
  • Commercial and Corporate Services