- Paris Union (from 19 November 1963)
- WIPO (from 26 September 1970)
- OAPI (from 5 November 1988)
Currently, the member States of OAPI are: Benin, Burkina Faso, Cameroon, Central African Republic, Chad, Congo, Comoros, Equatorial Guinea, Gabon, Guinea, Guinea Bissau, Ivory Coast, Mali, Mauritania, Niger, Senegal and Togo.
A single application automatically covers all member states and it is not possible to designate the countries of interest.
For more details see OAPI