1. Patentability requirements 2. Further requirements of an invention 3. Technical progress, advantageous effect Source: http://www.epo.org/law-practice/legal-texts/html/guidelines/e/g_i.htmDate retrieved: 17 May 20215 references found. Click X to load a reference inside the current page, click on the title to open in a new page.EPO Guidelines - G PatentabilityXGL G Patentability requirements Loading...XGL G I 1 Patentability requirements Loading...XGL G I 2 Further requirements of an invention Loading...XGL G I 3 Technical progress, advantageous effect Loading...XGL GL INDEX 2021 Loading...