Legal analysis: the most commonly used method of patent evaluation is the present value of income method. The fundamental problem of calculation is how to find, judge, select and calculate various technical indicators and parameters in patent evaluation, that is, the amount of patent income, discount rate and profit period. Patent income refers to the expected income directly brought by patent rights. The calculation of income can usually be obtained by directly measuring excess income and measuring profit sharing rate.
Legal basis: Article 12 of the Patent Law of People's Republic of China (PRC), where any unit or individual exploits another person's patent, it shall conclude an exploitation license contract with the patentee and pay the patentee the exploitation fee. The licensee has no right to allow any unit or individual other than those stipulated in the contract to exploit the patent.