中国技术多样性演进和热点领域分析——基于2000—2021年USPTO授权发明专利数据

Analysis of the Evolution of Technological Diversification and Hot Fields in China:Based on the data of China’s utility patents granted in USPTO from 2000 to 2021

为识别中国技术多样性演进特征,通过提取不同层次的专利IPC代码信息,统计专利覆盖的技术领域,计算表征技术多样性的熵指数。基于2000—2021年USPTO中国授权发明专利数据的研究结果表明:中国专利活动的技术领域逐年增加,在细分领域内的技术多样性呈增长趋势;中国技术热点从传统领域已转入新兴领域;专利数量排名前3位的专利权人的技术多样性和热点领域总体上处于持续拓展状态,采取的技术多样性战略和关注的热点领域则有所差异。

To identify the evolution characteristics of technological diversification in China,the technological fields covered by patents and the entropy index representing technological diversification are counted by extracting IPC code information at different levels.The research results based on the data of China’s utility patents granted in USPTO from 2000 to 2021 show that the technological fields of China's patent activities are increasing year by year,the degree of diversification in the sub-fields has been increasing;technological hot fields in China have shifted from traditional fields to emerging fields.The top 3 assignees’in terms of the number of patents technological diversification and hot fields are in a state of continuous expansion on the whole,and their technological diversification strategies and hot fields are different.