Who we are

J.E. Dias Costa

We are a reference office in Portugal in Industrial Property. We have a multidisciplinary team of specialists that meet all the needs of our clients.


International organizations that we are members in Intellectual Property area


Litigation in defense of rights


Jurisdictions where we monitor patent rights




Jurisdictions where we monitor trademark rights


Industrial Property Rights Watched and Tracked

Our History

With origins that date back to the early years of the last century, we are an office that encompasses the knowledge and experience of four successive generations of professionals. We have a multidisciplinary team of specialists with a long and diversified professional background, including several Official Industrial Property Agents (A.O.P.I.), qualified to act before the National Institute of Industrial Property (INPI), the European Patent Office (OEB) and the European Union Intellectual Property Office (EUIPO).

Leaders League Award

José de Sampaio and Ana de Sampaio, partners at JEDC | J.E. Dias Costa, were again distinguished in the Leaders League Ranking 2022 - José de Sampaio was distinguished as a LEADER, the highest position, in the Patents category. Ana de Sampaio was awarded the same distinction in the Trade Marks category.

Leaders League Award

J.E. Dias Costa, through his partner José de Sampaio, receives the maximum classification of 'Leading' in ​​'Patent Prosecution' granted by the ranking attributed by the Leaders League. Ana de Sampaio, also a partner, was distinguished in the category of 'Trademark Prosecution' in the same ranking. In turn, partner Gonçalo de Sampaio received the distinction of 'Global Leader' and 'National Leader' by the same organization.

Who's Who Legal Recognition

Gonçalo de Sampaio, partner at J.E. Dias Costa receives a reference for “patent litigation” by this renowned publication.

90 Years

The year in which we celebrated our 90th anniversary: ​​it was in 1929 that we took our first steps. More than nine decades later, J.E. Dias Costa presents itself as an unquestionable reference in Portugal in the field of Industrial Property.


Gonçalo de Sampaio, partner at J. E. Dias Costa, is elected President of the Portuguese Group of the AIPPI - International Association for the Protection of Intellectual Property, a position he still holds today.

A New Generation

In the 90s, a new generation (the fourth) joins the leadership of the company, with Ana, Gonçalo and Lourenço de Sampaio ensuring the continuation of the legacy, experience and knowledge acquired over the years.

New Office

In 1994, J.E. Dias Costa leaves the space of its foundation and moves to bigger and better premises in Rua do Salitre, right in the center of Lisbon.


In the 60's of the last century, brothers António Luís and José Eduardo de Sampaio took over the company’s destiny, promoting a significant implementation, nationally and especially internationally, of J.E. Dias Costa, which has been present, since then, in the international fora of discussion and debate related to Industrial Property.


After several years of success and growth, in August 1957 Cabinet Dias Costa is reorganized and gives place to a commercial company, called J.E. Dias Costa, starting to develop its growing and increasingly demanding activity, something that still stands until our days.


Our origins date back to Cabinet Dias Costa, founded in August 1929, when Engineer José Eduardo Dias Costa - the first chemical-industrial engineer licensed by Instituto Superior Técnico - is appointed Official Trademark and Patent Agent.