| African Intellectual Property Organisation (ARIPO) | AP |
| Eurasian Patent Organisation (EAPO) | EA |
| European Patent Office (EPO) | EP |
| Organisation Africaine de Propriéeté Intellectuelle (OAPI) | OA |
| World Intellectual Property Organisation (WIPO) | WO |
| Bosnia and Herzegovina | BA |
| Belgium | BE |
| Bulgaria | BG |
| Brazil | BR |
| Canada | CA |
| Switzerland | CH |
| China | CN |
| Czechoslovakia, former | CS |
| Cuba | CU |
| Cyprus | CY |
| Czech Republic | CZ |
| Germany | DE & DD |
| Denmark | DK |
| Estonia | EE |
| Egypt | EG |
| Spain | ES |
| Finland | FI |
| France | FR |
| United Kingdom | GB |
| Greece | GR |
| Hong Kong | HK |
| Croatia | HR |
| Hungary | HU |
| Ireland | IE |
| Israel | IL |
| India | IN |
| Italy | IT |
| Japan | JP |
| Kenya | KE |
| Rep. of Korea | KR |
| Lithuania | LT |
| Luxembourg | LU |
| Latvia | LV |
| Monaco | MC |
| Moldova | MD |
| Mongolia | MN |
| Malta | MT |
| Malawi | MW |
| Mexico | MX |
| Malaysia | MY |
| Netherlands | NL |
| Norway | NO |
| New Zealand | NZ |
| Philippines | PH |
| Poland | PL |
| Portugal | PT |
| Romania | RO |
| Russia | RU |
| Sweden | SE |
| Singapore | SG |
| Slovenia | SI |
| Slovakia | SK |
| U.S.S.R | SU |
| Tajikistan | TJ |
| Turkey | TR |
| Taiwan | TW |
| U.S.A. | US |
| Vietnam | VN |
| Yugoslavia | YU |
| South Africa | ZA |
| Zambia | ZM |
| Zimbabwe | ZW |