與貿易有關之智慧財產權協定 專利法 特許實施 當地實施 國家緊急情況 增進公益之非營利使用 可錄式光碟專利 克流感 強制授權學名藥出口 Agreement on trade-related aspects of intellectual property rights Patent law Compulsory licensing Local working requirement National emergency Public non-commercial use CD-R Tamiflu Exports of generic medicine manufactured under compulsory licensing