The theme of this final paper is: "Registration of patent and trademark as a form of intellectual property in the Republic of Croatia". In the beginning of the paper it is described what intellectual property is, and which are the forms of intellectual property. In addition, this paper describes the procedure for the protection of patent rights in the Republic of Croatia, its registration and publication, possible ways of registration testing and data lists that needs to be performed in requirements: recognition of a patent, registration of changes in the registry, the issuance or renewal of certificates of additional protection, also for error correction. The paper lists the main expenses for the recognition of patent rights. Finally, the paper describes the procedure for trademark protection in the Republic of Croatia, and it is indicated how it is preserved. Also describes the data that needs to be filled: the application form for registration of a trademark with the requirement for registration of changes in the registers and in the application for renewal of registration of a trademark. The costs of application and registration of trademarks are specified, as well as costs of recognition of the documents, rights and costs of registration extension.