Intellectual Property Case Adjudication Rules Article 27

Where the actions set out in Subparagraphs 2 to 7, Paragraph 1, Article 10 of the Act and other actions arising in the proceedings thereof involve patent rights, a party may also appoint a patent attorney as the joint agent ad litem with the permission of the presiding judge.Under the circumstances in the preceding paragraph, a patent attorney may not conduct litigation without permission granted by the presiding judge in court and is deemed absent unless the circumstances set out in Paragraph 3, Article 16 of the Act apply.
中文原文 智慧財產案件審理細則第27條
本法第十條第一項第二款至第七款之事件及其程序進行中所生之其他事件,因專利權涉訟者,經審判長許可,當事人亦得合併委任專利師為訴訟代理人。
前項情形,除有本法第十六條第三項規定之情形外,非經審判長當庭許可,專利師不得為訴訟行為,並視同不到場。

English translation for reference only; the Chinese text prevails. Not legal advice.