- Paris Union (from 19 November 1963)
- WIPO (from 23 August 1975)
- OAPI (from 1 June 1983)
- PCT (from 21 March 1989)
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