Abstract: This article proposes a method for identifying frontier patent technologies in order to discover cutting-edge patented technologies in the industry. According to the characteristics of cutting-edge patented technology with high attention, high centrality, high development potential, high scientific relevance and high technical relevance to design calculation methods for each feature, a frontier patent technology identification index system is constructed. The calculated results are respectively normalized calculated or by the gray relational analysis method, and the frontier value is calculated based on the entropy weight method. The field of artificial intelligence is taken as an example to conduct empirical research.According to the calculation results of the cutting-edge value, the patented technologies in the top 10 of the cutting-edge value from 2014 to 2019 which appear twice or more are defined as cuttingedge patented technologies. The number of applications is divided into three categories. The first category is patented technologies that have a relatively low number of applications but have a good scientific and technological foundation and a high degree of attention, the second category is developed patented technologies to lead the industry with a rapid increase in applications in recent years ,the third category is those more mature but still-developing patented technologies. It proves that the method proposed in this article is effective, and it has certain reference value for discovering cutting-edge patented technology in the industrial field in advance.

Key words: Industry field, Patented technology, Frontier identification, Artificial intelligence, International patent classification