Right of reciprocity
The countries which subscribe to the Convention grant the citizens of other countries the same IP rights as their own (Article 2 of the Convention).
Principle of assimilation
Citizens of non-subscribing countries are treated, in terms of rights, as the citizens of the countries of the Union if domiciled in one of the countries of the Convention or if they own industrial or commercial establishments in one of them (Article 3 of the Convention).
Right of priority
Any person who "has duly filed an application for a patent, or for the registration of a utility model, or of an industrial design, or of a trademark, in one of the countries of the Union, (...), shall enjoy, for the purpose of filing in the other countries, a right of priority" (Article 4 of the Convention).