Patentes y marcas
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Here you will find a link to the official patent search engine in Brazil. The use is free. However, the results offered by this search engine only include patented inventions and therefore may exist inventions not patented identical to the one you want to register. If you want a deep study of the state of the art prior to the application of a patent / utility model in Brazil you should hire the services of an Intellectual Property Firm.
If you wish to apply for a patent or utility model in Brazil, it is also advisable to hire the services of a professional to correctly write the patent application and meet the numerous formal requirements applicable .