The patents’ nationality in case of joint ownership is determined by Article 7 of Regulation 1257/2012 which states:
The present system of European (EP) patents granted by the European Patent Office, has the drawback that the same patent, validated in several states, may lead to several parallel disputes in these jurisdictions.
The Unified Patent package creates a unitary effect for European patents encompassing the states that have ratified the Unified Patent Court Agreement (UPCA – to be found here). That is to say, an EP patent with unitary effect will have the same effects in all the states that ratified the UPCA and where said patent has been validated.
Unitary Patent a unique protection for 17 states in Europe
With the recent ratification of Austria, the European Patent with unitary effect (“Unitary Patent”) will be introduced soon.