
Chambers Brazil Contentious 2026
Dannemann Siemsen is the leader in Intellectual Property: Patents, Trademarks, Copyright and Trade Secrets.
Other areas

For more than two decades, we have worked in consultancy and litigation in the Advertising Law segment.
In the preventive area, our professionals assist domestic and foreign clients in reviewing advertising campaigns with respect to the legislation and ethical standards in the sector, including the Brazilian Advertising Self-Regulation Code.
We also provide legal advice for conducting commercial promotions, from the preparation of regulations to conducting administrative procedures to obtain authorisation from public authorities.
In the area of disputes, we have enormous experience working with CONAR – the National Council for Advertising Self-Regulation. As part of the commercial relationship between advertisers and advertising agencies, we provide consultancy on the preparation of contracts, legal opinions and defence before CENP – the Executive Council of Standard Norms.

Dannemann Siemsen is the leader in Intellectual Property: Patents, Trademarks, Copyright and Trade Secrets.

Ivan analyzes the ongoing discussions within the World Intellectual Property Organization’s Working Group regarding potential changes to the rules of the Patent Cooperation Treaty (PCT), particularly with regard to the requirement for local counsel during the national phase of patent applications.

Dannemann Siemsen is the leader in Intellectual Property: Patents, Trademarks, Copyright and Trade Secrets.