Compared with China's invention patent application system, Sweden's invention patent application system has more relaxed examination standards, and the invention patent application does not need substantive examination. The Swedish Bureau will make a novelty search and review report within 6 months from the date of application. The applicant shall reply to the examination opinions within 4 months after receiving the examination opinions. Swedish patent applications can also enjoy the priority of 12 months stipulated in the Paris Convention, but there are great differences between Sweden and China in the way of claiming priority and the priority period. Where a patent application claims priority in China, it should be pointed out at the same time as the patent application is filed, while an application for a patent for invention in Sweden can be filed within 16 months from the priority date, or within 4 months after a new application is filed.