https://www.epo.org/en/about-us/foundation/member-states/date

List of member states sorted according to the date of accession

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