The state of the art is made available to the public by oral description when facts are unconditionally brought to the knowledge of members of the public, such as in the course of a conversation or a lecture or by means of radio, television or sound reproduction equipment (tapes and records).[Art. 54(2); ]
Source: http://www.epo.org/law-practice/legal-texts/html/guidelines/e/g_iv_7_3_1.htm
Date retrieved: 17 May 2021