Use of the prescribed request for grant form or the software provided by the EPO for electronic filing (see A‑II, 1.2.2) best provides "the indication that a patent is sought" as referred to in A‑II, 4.1(i) (see also A‑III, 4).
Source: http://www.epo.org/law-practice/legal-texts/html/guidelines/e/a_ii_4_1_1.htm
Date retrieved: 17 May 2021