Luiz Leonardos & Advogados

Luiz Leonardos & Advogados has 14 partners and over 60 professionals with extensive experience in all areas of intellectual property. The firm was created as a result of the split of Momsen, Leonardos & Cia in 2012, inheriting almost 100 years of legal excellence and solid ethical conduct. Momsen, Leonardos & Cia had been a pioneer in the field of intellectual property in Brazil, recognised worldwide for its expertise. The firm started with US lawyer Richard P Momsen in Rio de Janeiro in 1919. Attorney at law Thomas O Leonardos became his partner in 1927. The partnership became even stronger when Luiz Leonardos (one of Thomas’s sons) joined the firm in 1958 and later when Gustavo Leonardos (LLM from George Washington University), Luiz’s son, did the same. On 30 April 2012 Momsen, Leonardos & Cia ended its activity; a new framework was established to create Luiz Leonardos & Advogados, offering more effective and personal interaction with clients. The firm will soon change its name to Leonardos & Leonardos to reflect this new make-up, while continuing expanding its activities.

The firm has recently opened an office in Itaim Bibi, the financial centre of Sao Paulo, within walking distance of the regional branch of the Brazilian Patent and Trademark Office (BPTO). This new office enables the firm to better serve its national market, while expanding its team to meet the growing needs of its international clients.

In addition, the firm is also expanding its practice to general litigation from its Sao Paulo office. In order to provide its national and international clients with excellent services in IP-related areas, such as consumer protection, privacy and data protection, antitrust, food and drug law and regulatory law, the firm has assembled a team with the necessary expertise, skills and experience to handle judicial and non-judicial litigation matters.

Luiz Leonardos & Advogados has a multidisciplinary and highly skilled team, which includes engineers, biologists, lawyers and industrial property agents, all with solid academic education and long experience in the field of intellectual property. Additionally, it can count on the expertise of its founding partner Luiz Leonardos, who not only helped to shape the current IP legal framework in Brazil, but is also recognised by local and foreign specialists as one of the most respected professionals of his generation.

Luiz Leonardos & Advogados has a full-service IP consultancy and prosecution practice, providing solutions in the most diversified areas of intellectual property.

Luiz Leonardos & Advogados combines the knowledge and expertise gained over 100 years in practice with the advantages of a new, modern, personal and effective structure. Besides the tradition and experience in intellectual property, Luiz Leonardos & Advogados has maintained the same database and IT structure formerly used by Momsen, Leonardos & Cia, as well as all the original files. The firm’s internal system also contains all the trademarks and patents ever filed with and registered at the BPTO, making its daily updated database independent of the BPTO’s system. This means that the firm not only has faster access to data, but also that it has access even when the BPTO's database is unavailable – which happens frequently; this enables the firm to act when others cannot.

Contact details

Luiz Leonardos & Advogados
Avenida Rio Branco 80
6th Floor
Rio de Janeiro 20040-070

Professional contacts

Other offices

  • Sao Paulo

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