2. A patent is an invention protected by legal norms. It is an invention-creation that applies to the national examination and approval authority for a patent and is granted the exclusive right to invent within a specified time after passing the examination according to law.
3. The types of patents have different regulations in different countries. In China's patent law, there are: invention patent, utility model patent and design patent; In Hongkong patent law, there are: standard patent (equivalent to Chinese mainland's invention patent), short-term patent (equivalent to Chinese mainland's utility model patent) and design patent; In some developed countries, it is divided into invention patents and design patents.