Enforcement Rules of the Patent Act Article 71
Where an invalidation action is initiated after the patent has become extinguished ipso facto pursuant to Article 72 of the Act, the document(s) evidencing recoverable legal interests as a result of revocation of the patent right shall be submitted.
中文原文 專利法施行細則第71條
依本法第七十二條規定，於專利權當然消滅後提起舉發者，應檢附對該專利權之撤銷具有可回復之法律上利益之證明文件。