Firm / Organisation

Dannemann Siemsen

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Senior Partner: Luiz Henrique O. do Amaral
Managing Partners: Peter Dirk Siemsen, Luiz Henrique O. do Amaral, Raul Hey, Gustavo de Freitas Morais, Peter Eduardo Siemsen, Joaquim Eugenio Goulart, Attilio Gorini
Number of partners: 70
Number of lawyers: 240
Chinese, English, French, German, Italian, Japanese, Portuguese, Spanish

Recognised as leaders in intellectual property in Latin America, Dannemann Siemsen is a team of experts that has been dedicated to defending industrial and intellectual property since 1900. The firm operates throughout the world, encompassing first-rate civil and criminal advocacy, covering diverse areas of law and all industry segments of large national and international companies. Today the firm has offices in three Brazilian state capitals and has gathered a team of practitioners with expert knowledge of intellectual property, litigation, contracts and other areas of law. This allows the firm to advise clients in the main legal proceedings, making it a strategic partner in the pursuit of innovation and knowledge. The firm has an extensive team of industrial property agents – an experienced and specialised technical team that is kept up-to-date with the transformations and demands of the market. In a dynamic world where knowledge is essential for any company to stand out in the market, Dannemann Siemsen believes in the value of human capital and in creativity as a source of innovation. With more than a century of experience and a wide range of services, the firm is proud to be the foundation for clients to seek innovative and pioneering paths.


Intellectual Property:
With a team of professionals recognised nationally and internationally, the firm is a reference point in IP law for offering a first-rate service in patent filings, trademark registrations, design protection, copyright, trade secrets and in the entire process of software registration.
The firm’s experience allows it to develop the most comprehensive strategies in the protection of patents. These include the first application to opposition after granting and ensuring the best legal backing from a multidisciplinary team of electrical, electronic, mechanical, chemical and telecommunications engineers, pharmacists and biologists, among others.
Through this sector, which is dedicated to the protection of trademarks, the firm also advises clients on matters from searches to appeals, with strategic thinking for trademark portfolio management and supervision structures, including on digital media which involves constant monitoring of the changes in INPI’s internal regulations and administrative decisions.

Dannemann Siemsen is a heavyweight litigation firm, representing multinational and national companies and individuals in all fields of industry. The firm has a large and multidisciplinary team of partners and attorneys, with extensive and valuable experience before all levels of the Brazilian courts and public agencies. The team of young and talented lawyers work hard using modern and innovative strategies in disruptive cases. The firm’s success rate is extremely high, from basic cases to complex matters, not only in court actions but also in alternative dispute resolutions (mostly arbitrations and mediations), class actions, regulatory and administrative proceedings.
Amongst the firm’s dedicated teams is its strong group of intellectual property litigators and technicians, working side by side in the most important and leading IP cases in the country. The firm has developed exclusive teams that handle contractual, franchise, real estate, corporate, consumer protection law, telecom, civil law, environmental law and tax litigations. What makes the firm’s professionals stand out from the crowd is their availability, adaptability, quality and focus on each client, in order to provide the best counselling and to reach the most favorable results.

Consumer Relations:
The consumer relations area arose from a growing demand from companies for an intelligent management and structured handling of mass litigation. The firm begins with a strategic vision of prevention in consumer relations and mediation between companies and consumers, with a focus on the preservation of the public image and brand of clients.
Up to date with the key innovations in this sector, the firm offers a specialised service for clients, with the automation of lawsuits and the capture of demand in distribution and flow of administrative control in the consultative, judicial litigation, administrative litigation and business prevention areas.


The firm acts as a reference point for clients in the area of licensing agreements for intellectual property and the purchasing of technological knowledge and franchises. These need to be annotated at INPI to allow the remittance of remuneration to the foreign party, qualify the licensee for tax deduction of the amounts paid and produce effects for third parties.
The firm’s lawyers assist their clients from the start of negotiations, preparation and/or analysis of the agreement, until the execution, evaluating all aspects of the negotiation with all the necessary governmental authorisations.

Law and Technology:
The leadership in Intellectual Property also rendered Dannemann Siemsen a prominent position in Technology legal practice. Being the go to law firm whenever new technologies and new business methods are at stake, the firm developed a solid and wide range practice in the area. From Regulatory to Contracts, Compliance to Litigation, the firm has highly experienced lawyers prepared to advise clients in different legal demands, such as: Privacy & Data Protection, Artificial Intelligence legal aspects, Blockchain & Smart Contracts, Software and algorithms and Technology regulation.
Adding high value to the development of new business models, the talented Civil Litigation team work closely with the Technology Group providing support to strategic litigation if necessary, including class actions, constitutional remedies against illegal regulations, general civil actions, proceedings at PROCON, CONAR and Public Prosecutor’s Office, among others.
Last but not least, one aspect that places Dannemann Siemsen apart is its top notch technical staff composed of Engineers and Technical Consultants who team up with the lawyers to provide the necessary guidance for a better understanding of the new business models and technologies.

Additional Practice Areas: The firm also has specialised teams to advise clients on the areas of Advertising Law, Regulatory Law, Environmental Law, Corporate Law, Tax Law, Compliance and Internal Investigations, Evaluation of Intellectual Assets and Labour Law.

Main Industrial Sectors: Food, Beverages and Tobacco, Automotive Industries, Banks and Capital Assets, Biotechnology, Clubs and Confederations, Foreign trade, Construction, Pesticides, Education and Cultural Institutions, Electronics and Technology, Packaging, Energy, Entertainment and Media, Pharmaceutical/ Life Sciences, Hygiene and Cosmetics, Inventors, Marketing and Advertising, Mining and Steel Industry, Chemicals and Petrochemicals, Insurance, Services and Information Technology.