The following states (sorted alphabetically) are currently members of the European Patent Organisation.
| Code | Member state |
Since |
|---|---|---|
| AL |
Albania |
1 May 2010 |
| AT | Austria |
1 May 1979 |
| BE |
Belgium |
7 October 1977 |
| BG |
Bulgaria |
1 July 2002 |
| CH | Switzerland |
7 October 1977 |
| CY | Cyprus |
1 April 1998 |
| CZ |
Czech Republic |
1 July 2002 |
| DE |
Germany |
7 October 1977 |
| DK |
Denmark |
1 January 1990 |
| EE |
Estonia |
1 July 2002 |
| ES |
Spain |
1 October 1986 |
| FI |
Finland |
1 March 1996 |
| FR |
France |
7 October 1977 |
| GB |
United Kingdom |
7 October 1977 |
| GR |
Greece |
1 October 1986 |
| HR |
Croatia |
1 January 2008 |
| HU |
Hungary |
1 January 2003 |
| IE |
Ireland |
1 August 1992 |
| IS |
Iceland |
1 November 2004 |
| IT |
Italy |
1 December 1978 |
| LI |
Liechtenstein |
1 April 1980 |
| LT |
Lithuania |
1 December 2004 |
| LU |
Luxembourg |
7 October 1977 |
| LV | Latvia |
1 July 2005 |
| MC |
Monaco |
1 December 1991 |
| ME |
Montenegro |
1 October 2022 |
| MK |
North Macedonia | 1 January 2009 |
| MT | Malta |
1 March 2007 |
| NL |
Netherlands |
7 October 1977 |
| NO |
Norway |
1 January 2008 |
| PL |
Poland |
1 March 2004 |
| PT |
Portugal |
1 January 1992 |
| RO |
Romania |
1 March 2003 |
| RS |
Serbia |
1 October 2010 |
| SE |
Sweden |
1 May 1978 |
| SI |
Slovenia |
1 December 2002 |
| SK |
Slovakia |
1 July 2002 |
| SM |
San Marino |
1 July 2009 |
| TR |
Türkiye |
1 November 2000 |
