The country of convention priority is identified by a two-letter code conforming to the World Intellectual Property Office (WIPO) Standard ST.3 "Recommended Standard on Two-Letter Codes for the Representation of States, Other Entities and Intergovernmental Organizations".
The code for convention countries is as follows:
| Code | Country |
|---|---|
| AD | Andorra |
| AE | United Arab Emirates |
| AG | Antigua and Barbuda |
| AL | Albania |
| AM | Armenia |
| AO | Angola |
| AP | African Regional Intellectual Property Organisation (ARIPO) |
| AR | Argentina |
| AT | Austria |
| AU | Australia |
| AZ | Azerbaijan |
| BA | Bosnia and Herzegovina |
| BB | Barbados |
| BD | Bangladesh |
| BE | Belgium |
| BF | Burkina Faso |
| BG | Bulgaria |
| BH | Bahrain |
| BI | Burundi |
| BJ | Benin |
| BN | Brunei Darussalam |
| BO | Bolivia |
| BR | Brazil |
| BS | Bahamas |
| BT | Bhutan |
| BW | Botswana |
| BQ | Bonaire, Saint Eustatius and Saba |
| BX | Benelux Office |
| BY | Belarus |
| BZ | Belize |
| CA | Canada |
| CD | Democratic Republic of Congo |
| CF | Central African Republic |
| CG | Congo |
| CH | Switzerland |
| CI | Cote d'Ivoire |
| CL | Chile |
| CM | Cameroon |
| CN | China |
| CO | Colombia |
| CR | Costa Rica |
| CU | Cuba |
| CV | Cape Verde |
| CW | Curacao |
| CY | Cyprus |
| CZ | Czechia |
| DE | Germany |
| DJ | Djibouti |
| DK | Denmark |
| DM | Dominica |
| DO | Dominican Republic |
| DZ | Algeria |
| EA | Eurasian Patent Organisation (EAPO) |
| EC | Ecuador |
| EE | Estonia |
| EG | Egypt |
| EM | European Union Intellectual Property Office (EUIPO) |
| EP | European Patent Office |
| ES | Spain |
| EU | European Union |
| FI | Finland |
| FJ | Fiji |
| FR | France |
| GA | Gabon |
| GB | United Kingdom |
| GC | Patent Office for the Cooperation Council for the Arab States of the Gulf (GC) |
| GD | Grenada |
| GE | Georgia |
| GH | Ghana |
| GM | Gambia |
| GN | Guinea |
| GQ | Equatorial Guinea |
| GR | Greece |
| GT | Guatemala |
| GW | Guinea-Bissau |
| GY | Guyana |
| HK | Hong Kong, China |
| HN | Honduras |
| HR | Croatia |
| HT | Haiti |
| HU | Hungary |
| ID | Indonesia |
| IE | Ireland |
| IL | Israel |
| IN | India |
| IQ | Iraq |
| IR | Islamic Republic of Iran |
| IS | Iceland |
| IT | Italy |
| JM | Jamaica |
| JO | Jordan |
| JP | Japan |
| KE | Kenya |
| KG | Kyrgyz Republic |
| KH | Cambodia |
| KM | Comoros |
| KN | Saint Kitts and Nevis |
| KP | Democratic People's Republic Korea |
| KR | Republic of Korea |
| KW | Kuwait |
| KZ | Kazakhstan |
| LA | Lao People's Democratic Republic |
| LB | Lebanon |
| LC | Saint Lucia |
| LI | Liechtenstein |
| LK | Sri Lanka |
| LR | Liberia |
| LS | Lesotho |
| LT | Lithuania |
| LU | Luxembourg |
| LV | Latvia |
| LY | Libyan Arab Jamahiriya |
| MA | Morocco |
| MC | Monaco |
| MD | Republic of Moldova |
| ME | Montenegro |
| MG | Madagascar |
| MK | Former Yugoslav Republic of Macedonia |
| ML | Mali |
| MM | Myanmar |
| MN | Mongolia |
| MO | Macau, China |
| MR | Mauritania |
| MT | Malta |
| MU | Mauritius |
| MV | Maldives |
| MW | Malawi |
| MX | Mexico |
| MY | Malaysia |
| MZ | Mozambique |
| NA | Namibia |
| NE | Niger |
| NG | Nigeria |
| NI | Nicaragua |
| NL | Netherlands |
| NO | Norway |
| NP | Nepal |
| NZ | New Zealand |
| OA | African Intellectual Property Organization (OAPI) |
| OM | Oman |
| PA | Panama |
| PE | Peru |
| PG | Papua New Guinea |
| PH | Philippines |
| PK | Pakistan |
| PL | Poland |
| PT | Portugal |
| PY | Paraguay |
| QA | Qatar |
| QZ | Community Plant Variety Office (European Union) (CPVO) |
| RO | Romania |
| RS | Serbia |
| RU | Russian Federation |
| RW | Rwanda |
| SA | Saudi Arabia |
| SB | Solomon Islands |
| SC | Seychelles |
| SD | Sudan |
| SE | Sweden |
| SG | Singapore |
| SI | Slovenia |
| SK | Slovak Republic |
| SL | Sierra Leone |
| SM | San Marino |
| SN | Senegal |
| SR | Suriname |
| SS | South Sudan |
| ST | Sao Tome and Principe |
| SV | El Salvador |
| SX | Saint Maarten |
| SY | Syrian Arab Republic |
| SZ | Eswatini |
| TD | Chad |
| TG | Togo |
| TH | Thailand |
| TJ | Tajikistan |
| TM | Turkmenistan |
| TN | Tunisia |
| TO | Tonga |
| TR | Turkey |
| TT | Trinidad and Tobago |
| TW | Taiwan |
| TZ | Tanzania, United Republic of |
| UA | Ukraine |
| UG | Uganda |
| US | United States of America |
| UY | Uruguay |
| UZ | Uzbekistan |
| VA | Holy See (Vatican City) |
| VC | Saint Vincent and Grenadines |
| VE | Venezuela |
| VN | Vietnam |
| WS | Samoa |
| XN | Nordic Patent Institute (NPI) |
| XU | International Union for the Protection of New Varieties of Plants (UPOV) |
| XV | Visegrad Patent Institute (VPI) |
| XX | Unknown |
| YE | Yemen |
| ZA | South Africa |
| ZM | Zambia |
| ZW | Zimbabwe |