A Review of the Reform of Patent Act in the United States(Zhang Huaiyin) Calls for patent reform in the United States have grown stronger recently as a result of the increase of the number of patents and patent litigation. Members of Congress from both parties have submitted the Patent Reform Act to Congress three times since 2005. The content for revision includes the principle of first to apply, the way of calculating damages, the creation of postgrant procedures and the establishment of patent trial and appeal board. The submission of the reform act has caused widespread concern and heated debate among business circles, the states and various interest groups. It will lead the public to a deeper consideration on the American patent system.