How long is the validity of the patent exclusive license contract?

The patent licensing contract is valid only during the duration of the patent right, and can be agreed by both parties during the duration of the patent right. Duration of patent right China's patent law clearly stipulates that the duration of invention patent right is 20 years, and the duration of utility model patent right and design patent right is 10 years, all of which are counted from the date of application. . Duration of patent right China's patent law clearly stipulates that the duration of invention patent right is 20 years, and the duration of utility model patent right and design patent right is 10 years, all of which are counted from the date of application.