3.10. Rule 109 EPC – composition of the Enlarged Board and review procedure
3.10.3 Group parties
In R 18/09 the Enlarged Board held that the principles set out in G 3/99 (OJ 2002, 347), also applied to petition for review proceedings, namely that a plurality of persons acting in common must be treated as a single party (a "group party") and that such a group party must act through a common representative.