human: What are the main pros and cons of a Unitary Patent?
assistant: Pro Unitary Patent	Con Unitary Patent
One step to register unitary effect at the EPO without official fee.	It can only be maintained or revoked for all CMS.
No more national validations, i.e., no parallel multiple translations and multiple payment of annuities necessary.	
Potentially reduced translation cost after transitional period.	Potentially higher translation costs during transitional period since the European patent is normally only validated in London Agreement countries.
Lower renewal fees if the European patent shall be validated in four or more EU member states.	Higher renewal fees if the European patent shall be validated in three or less countries.
Covers at least the 17 CMS.	Does not cover all EPC member
states – for countries that are not part of the UPC system, the European patent needs to be validated as has previously been the case.

The Unitary Patent falls within the competence of the UPC and allows enforcement in one single action in currently 17 CMS.	The Unitary Patent cannot be opted-out from the UPC and can be invalidated in one single action for currently 17 CMS.