Where an applicant has first applied for a patent in a foreign country, which reciprocally allows R.O.C. nationals to claim patent priority, or with any member of the World Trade Organization (WTO), the applicant may claim priority in respect of an R.O.C. patent application for the same invention if the R.O.C. patent application for the same invention is filed within twelve (12) months after the filing date of the said first patent application. And, the period of twelve (12) months prescribed is calculated from _____ of first patent application to the filing date of the R.O.C. patent application.