The UPC agreement has been signed by 25 EU member states, including all states participating in the enhanced cooperation measures except Poland; while Italy, on the other hand, signed the UPC agreement prior to joining the enhanced cooperation measures for a unitary patent.
Perjanjian UPC ditandatangani oleh 25 negara anggota UE, termasuk semua negara yang berpartisipasi dalam kerja sama kecuali Polandia, sedangkan Italia menandatangani perjanjian UPC sebelum bergabung dalam kerja sama tertingkatkan untuk paten berdasarkan kesatuan.