1.6 Hearing of parties, witnesses and experts
1.6.1 General remarks
Where the examining or opposition division holds hearings for the purpose of taking evidence (see E‑IV, 1.3) or if the case in question is expected to give rise to particular legal issues, it is advisable to enlarge the division by adding a legally qualified examiner, if this has not already been done (see D‑II, 2.2).
The evidence of witnesses is normally taken at oral proceedings, either on the premises of the EPO or by videoconference. A party, witness or expert can even be heard by videoconference if the oral proceedings are otherwise held on the EPO premises. For details, see OJ EPO 2020, A135.
The hearing will be either public or non-public, depending on the oral proceedings themselves (Art. 116(3) and Art. 116(4)).
Where a hearing is held in connection with oral proceedings, the considerations set out in E‑III, 8.2, E‑III, 8.3, E‑III, 8.9 and E‑III, 8.10 are directly applicable, and where this is not the case they apply mutatis mutandis.
A precondition for hearing an "expert" within the meaning of Rule 117 is a decision to take evidence (see E‑IV, 1.4). This is different from hearing oral submissions by a person accompanying the representative during oral proceedings, which can be allowed at the division's discretion (see G 4/95 and E‑III, 8.5).