Patent offices of member states
- Albanian Patent and Trademark Office
- Austrian Patent Office
- Bulgaria - Bulgarian Patent Office
- Belgian Patent Office (Ministry of Economic Affairs)
- Croatian Patent Office
- Czech Republic - Industrial Property Office
- The Department of the Registrar of Companies and Official Receiver (D.R.C.O.R.) of the Republic of Cyprus
- Danish Patent Office
- Estonia - The Estonian Patent Office
- Oficina Española de Patentes y Marcas
- National Board of Patents and Registration of Finland
- Institut National de la Propriété Industrielle (France)
- German Patent and Trademark Office / Deutsches Patent- und Markenamt
- Greek Industrial Property Organisation
- Hungarian Intellectual Property Office
- The Icelandic Patent Office
- Irish Patents Office
- Italian Patent and Trademark Office
- Patent Office of the Republic of Latvia
- Information about patent law in Liechtenstein
- The State Patent Bureau of the Republic of Lithuania
- Service de la Propriété Intellectuelle (Luxembourg)
- Malta Industrial Property Registration Directorate
- The State Office of Industrial Property of the former Yugoslav Republic of Macedonia
- Direction de l'Expansion Économique - Division de la Propriété Intellectuelle (Monaco)
- Octrooicentrum Nederland (The Netherlands Patents Office)
- Norwegian Patent Office
- Patent Office of the Republic of Poland
- Portuguese Patent Office
- Romanian State Office for Inventions and Trademarks
- Patent and Trademark Office of the Republic of San Marino
- Republic of Serbia - Intellectual Property Office
- Slovak Republic - Industrial Property Office
- Slovenian Intellectual Property Office
- Swedish Patent and Registration Office
- Swiss Federal Institute of Intellectual Property
- Turkish Patent Institute
- United Kingdom Intellectual Property Office