The United States does not pursue quantity in patent applications, but values the quality of patent applications. The patent system in the United States pays attention to the protection of innovative technologies and ideas, and the examination of patent applications is very strict, requiring that the patents applied for must be innovative and non-obvious. The United States Patent and Trademark Office (USPTO) also encourages inventors to speed up patent examination through priority examination and expedited examination, so as to improve the quality and efficiency of patent examination. This system design makes the United States pay more attention to the quality and practical value of patents instead of pursuing quantity in patent application.