- Paris Union (from 5 July 1964)
- WIPO (from 18 May 1975)
- OAPI (from 8 February 1982)
- PCT (from 21 March 1993)
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