For more details on this topic, see E‑IX.
Source: http://www.epo.org/law-practice/legal-texts/html/guidelines/e/c_ix_4.htm
Date retrieved: 17 May 2021
Source: http://www.epo.org/law-practice/legal-texts/html/guidelines/e/c_ix_4.htm
Date retrieved: 17 May 2021