Where can I buy a patent? How much does a patent cost?

If it is only official expenses, the utility model application fee is 500 yuan. If the utility model is authorized in the later stage, there will be a patent registration fee, printing fee and stamp duty of 205 yuan, and the annual fee for the current year will be 600 yuan (this depends on the authorization time, but if the utility model is authorized, the annual fee for the first year is usually paid). This fee can be reduced or exempted. The reduction or exemption ratio of individuals and units is different, and the number of patentees will also affect the reduction or exemption ratio.