Greece: Inventions made by Greeks abroad

Managing IP is part of Legal Benchmarking Limited, 1-2 Paris Gardens, London, SE1 8ND

Copyright © Legal Benchmarking Limited and its affiliated companies 2026

Accessibility | Terms of Use | Privacy Policy | Modern Slavery Statement

Greece: Inventions made by Greeks abroad

The number of international patent applications (PCT and European applications) filed before the Greek patent office as receiving office has been steadily rising over the last few years. However this is certainly not the result of an economic growth. On the contrary the country has been in recession and the market has been shrinking over the years.

The rise in the number of applications seems to be an indirect effect of the migration of Greeks abroad. With a youth unemployment rate reaching close to 50%, thousands of young, educated Greeks have left the country to work in wealthier countries, mostly in western Europe.

In cases where they are working in scientific research that may result in patent applications, there is an absolute obligation that such patent applications be filed first in Greece. According to legislation dating back to 1963 (law 4325/63) all patent applications by Greek nationals need to be first filed in Greece in order to receive a check to determine whether they are relevant to national security. Accordingly, the restrictions apply to all inventions, having no priority application filed in Greece, where the inventor or applicant is a Greek citizen, regardless of whether he or she is resident in Greece.

It is worth noting that there are no provisions to allow one to retroactively correct a mistake if such an invention was first filed abroad. There are also no provisions for obtaining a security clearance or a foreign filing licence. Breach of the obligation to first file in Greece is considered a criminal offence, which could result to imprisonment of the inventor or applicant disclosing the invention abroad. While the legal provisions have not been applied in practice, they still exist, so an applicant or inventor would need to assess the risk, in such circumstances, before making a decision to first file abroad. In order to comply with the legal requirements, the applicant can either file a Greek national application, a European application or a PCT application, filed before the Greek patent office as receiving office. Apart from these criminal sanctions, there are no implications for the validity of the patent application of a Greek applicant or inventor, first filed abroad.

kilimiris.jpg

Constantinos Kilimiris


Patrinos & Kilimiris7, Hatziyianni Mexi Str.GR-11528 AthensGreeceTel: +30210 7222906, 7222050Fax: +30210 7222889info@patrinoskilimiris.comwww.patrinoskilimiris.com

more from across site and SHARED ros bottom lb

More from across our site

South Korea's One Law Partners is combining with boutique firm Minwho Law Group to leverage global expansion of K-content and build a broader offering spanning IP, tech and regulatory advisory work
Russell Kennedy's Gina Tresidder on juggling matters, delivering hard truths, and why IP ownership is rarely as simple as people think
Attorney Oran Friar and trainee attorney Harry Cunliffe at Reddie & Grose, share that patent filings for clinical LLMs are surging, but success in the UK and Europe hinges on demonstrating technical innovation
Implementers can use the UK courts to seek FRAND terms for patent pool licences
The first credible UPC spinouts are growing, and they are coming from elite patent litigation teams, suggesting specialist litigators may no longer need large platforms to compete
Voyage IP has hired a veteran IP leader from Spruson & Ferguson as its head of trademarks, as well as another consultant who will boost the firm’s commercial offering
Lawyers say unwritten appearance expectations can disproportionately affect women and junior talent, making proactive guidance a growing responsibility for law firm leaders
Apple’s lawsuit against OpenAI, which features Tier 1-ranked disputes firms on both sides, reflects how trade secrets litigation is becoming a prominent competition feature
Drew & Napier’s leadership appointments show one way full-service firms can back up claims about the strategic importance of IP
Strike-out application will hear claims that the copyright aspect of an IP infringement claim brought by a gambling and sports betting group should be dropped
Gift this article