The Taiwan-Korea Electronic Exchange of Priority Documents (PDX) Program launched on January 1, 2016. Under the PDX program, an applicant who first files an invention or utility model patent application with the TIPO and who subsequently files an application with the KIPO claiming priority of the earlier Taiwan patent application may request the KIPO to adopt electronic priority documents. The applicant may make such request by making a statement to such effect. Such electronic priority documents can replace the paper priority documents. Likewise, an applicant who first files a patent application with the KIPO and later files an application with the TIPO may also claim priority of the earlier Korean application in the same manner. In addition, this PDX program is applicable to applications with priority claims filed within 16 months prior to the launch of this program.