- Paris Union (from 23 October 1963)
- WIPO (from 1 May 1974)
- OAPI (from 8 February 1982)
- PCT (from 30 April 1991)
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