- Paris Union (from 1 March 1983)
- WIPO (from 14 August 1982)
- OAPI (from 30 September 1984)
- PCT (from 19 October 1984)
Currently, the member States of OAPI are: Benin, Burkina Faso, Cameroon, Central African Republic, Chad, Comoros, Congo, 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