Patent Member States of the European Patent Office

At present, the member countries of the European Patent Office are all designated, and the application itself is valid for all countries unless you withdraw the designation of a certain country.

However, whether the patent is valid in a certain country depends on whether you have paid the relevant fees and registered in that country.

Even if the European patent is authorized, it is still nominal and needs to be registered in a country before it can take effect in a country.