(1) Where at least two persons jointly perform a patent-related procedure, each of them shall represent all, except for any of the following acts: Provided, That if they appoint their representative and report to the Commissioner of the Korean Intellectual Property Office or the President of the Korean Intellectual Property Trial and Appeal Board on the appointment, the representative only may represent all of them: <Amended on Feb. 29, 2016>
1. To modify, abandon, or withdraw a patent application;
2. To withdraw an application for registering the extension of the term of a patent;
3. To withdraw an application;
4. To withdraw a request;
5. To claim a priority under Article 55 (1) or withdraw a priority claim;
6. To file a petition for trial under Article 132-17.
(2) When a report is filed under the proviso of paragraph (1), the appointment of the representative shall be evidenced in writing.[This Article Wholly Amended on Jun. 11, 2014]