Patent applications are worldwide patent applications filed through the Patent Cooperation Treaty procedure or with a national patent office.
| 1990 | 2000 | 2005 | 2010 | 2011 | 2012 | 2013 | 2014 | 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Haiti | 13 | 15 | 11 | 19 | |||||||||||
| Burundi | 3 | 10 | 2 | 15 | 5 | ||||||||||
| Congo, Dem. Rep. | 107 | 90 | 110 | ||||||||||||
| Sierra Leone | 100 | 5 | 4 | ||||||||||||
| Yemen, Rep. | 22 | 23 | 55 | 37 | 49 | 37 | 24 | 25 | 16 | 13 | 15 | 8 | 22 | ||
| Papua New Guinea | 79 | 46 | 33 | 63 | 53 | 29 | |||||||||
| Sao Tome and Principe | 1 | 2 | 8 | 3 | 14 | 14 | |||||||||
| Cote d'Ivoire | 1 |