Intellectual Property Code
Section 99. Notice of Hearing. - 99.1. Upon filing of a petition, the Director of Legal Affairs shall forthwith serve notice of the filing thereof upon the patent owner and all persons having grants or licenses, or any other right, title or interest in and to the patent and invention covered thereby as appears of record in the Office, and of notice of the date of hearing thereon, on such persons and petitioner. The resident agent or representative appointed in accordance with Section 33 hereof, shall be bound to accept service of notice of the filing of the petition within the meaning of this Section.
99.2. In every case, the notice shall be published by the said Office in a newspaper of general circulation, once a week for three (3) consecutive weeks and once in the IPO Gazette at applicant's expense. (Sec. 34-E, R.A. No. 165)