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Four WIPO classification systems: International Patent Classification (IPC), Nice Classification, Locarno Classification, Vienna Classification. Classification systems which organize information concerning inventions, trademarks, and industrial designs. Regularly updated to include changes and advances in technology and commercial practices. This site contains basic information concerning four international classifications, their use worldwide, principles of their application and revision and explanatory material. It also includes a latest edition of each classification in the English and French languages. Luokitusjärjestelmä patenttien, tavaramerkkien yms. kuvailuun. Palvelu sisältää neljä kansainvälistä luokitusjärjestelmää.