∎Currently participating EU Member States (ratification completed)
| Austria (AT) | Estonia (EE) | Luxembourg (LU) | Sweden (SE) |
| Belgium (BE) | Finland (FI) | Latvia (LV) | Slovenia (SI) |
| Bulgaria (BG) | France (FR) | Malta (MT) | |
| Germany (DE) | Italy (IT) | Netherlands (NL) | |
| Denmark (DK) | Lithuania (LT) | Portugal (PT) |
∎Participating EU Member States (ratification not yet completed)
| Cyprus (CY) | Greece (GR) | Ireland (IE) | Slovakia (SK) |
| Czech Republic (CZ) | Hungary (HU) | Romania (RO) |
∎Non-participating EU Member States
| Spain (ES) | Croatia (HR) | Poland (PL) |
∎States of the European Patent Convention which are not members of the EU
| Albania (AL) | Iceland (IS) | Montenegro (ME) | Serbia (RS) |
| Switzerland (CH) | Liechtenstein (LI) | North Macedonia (MK) | San Marino (SM) |
| United Kingdom (GB) | Monaco (MC) | Norway (NO) | Turkey (TR) |
∎Extension and validation states
| Morocco (MA) | Bosnia and Herzegovina (BA) | Tunisia (TN) |
| Republic of Moldova (MD) | Cambodia (KH) Not shown on the map |
(Status June 2023)