关键词: 专利价值, 改进的专利续期模型, 未失效专利, 高价值发明专利

Abstract: Patent value expresses the heterogeneity of innovations, the effect of transformation and application of patents, and can more accurately reveal the level of technological innovation. This paper combines the characteristics of inventions, utility models and designs in the Chinese patent system to improve the patent renewal model, and considers the renewal proportion of unexpired patents, then estimates the value of Chinese patents based on the present value of total revenue. Thereafter, we analyze the development of patent value in China and its internal composition, and study the features of high-value inventions. The research finds that: first, the development of the total value of patents in China has shown stage characteristics from “low speed” to “medium high speed” to “high speed” since 1985, and the average annual growth rate after 2001 has reached 45.17%; second, the value of the three types of patents has shown a significant growth trend, but utility models and designs have not achieved simultaneous growth in quantity and value; third, the value between patents varies greatly, indicating that the number of patents can be misleading in measuring the level of technological innovation; fourth, the top 20% of high-value inventions defined by value are mainly concentrated in Guangdong, Beijing, Shanghai, Jiangsu and Zhejiang, and the value scale gap between the provinces is huge; fifth, among the high-value inventions in strategic emerging industries defined by fields, the new generation of information technology industry contributes more than 40% of the value.

Key words: Patent Value, Improved Patent Renewal Model, Unexpired Patents, High-value Patent