The authorization period of design patents issued before May 20 15 13 is 14 years, and there is no need to maintain design patents. As of May 13, 2065438, the patent term has been changed to 15 from the date of designation of the national design application in Chapter 16 and the design patent authorization in the American international design application, and there is no need to maintain the existing design patent at any cost. If it is determined during the review that the applicant has the right to obtain the design patent according to law, a subsidy notice will be issued to the applicant or the applicant's lawyer or agent, demanding payment of the distribution fee. Drawings with design patents conform to the same rules as other drawings, but they are not allowed to be quoted. The drawings should clearly describe the appearance, because they define the scope of patent protection.