Patent applications are worldwide patent applications filed through the Patent Cooperation Treaty procedure or with a national patent office.
| 1990 | 2011 | 2012 | 2013 | 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Cabo Verde | 1 | 1 | 1 | 4 | 1 | ||||||
| Cote d'Ivoire | 1 | ||||||||||
| Ghana | 20 | 17 | 11 | 39 | 8 | ||||||
| Nigeria | 246 | 747 | 676 | 869 | 150 | 180 | 509 | 683 | 598 | ||
| Sierra Leone | 100 | 5 | 4 | ||||||||
| Gambia, The | 2 | 2 | 4 | 16 | 66 | 91 |