 Until a decision of the Enlarged Board of Appeal of the EPO of 1994, namely G 9/93 (reverting earlier decision of the same instance of 1985, namely G 1/84), it was possible for the proprietor of a European patent to oppose its own patent with the aim of centrally limiting it.Decision G 9/93 however deprived patent proprietors of this opportunity.This means that, after G 9/93, the only possibility for the proprietor of a European patent to voluntarily limit the scope conferred by its patent (e.g.