How long is the duration of patent protection?

According to Article 42 of the Patent Law, the term of protection of a patent can be divided into the following categories: 1. The term of protection of an invention patent is 20 years, counting from the date of application. 2. The protection period of the patent for utility model is 10 year, counting from the date of application. 3. The protection period of the design patent is 10 years, counting from the date of application.