How long is the patent protection period?

Legal analysis: the protection period of invention patent is 20 years from the date of application; The protection period of utility model and design patent is 10 year from the date of application.

Legal basis: After the patent right for inventions and utility models is granted in Article 11 of the Patent Law of People's Republic of China (PRC), except as otherwise provided in this Law, no unit or individual may exploit the patent without the permission of the patentee, that is, they may not manufacture, use, promise to sell, sell or import their patented products for production and business purposes, or use their patented methods and use, promise to sell, sell or import products directly obtained according to the patented methods.