Article
Other
ID: <
oai:doaj.org/article:a0a044c63f6a4a9cae7831c52550691d>
·
DOI: <
10.13266/j.issn.2095-5472.2021.019>
Abstract
[Purpose/significance] From the perspective of complex networks, the development and evolution characteristics of regional patents in the field of patentee cooperation and patent applications are studied, this paper provides some reference for research methods of regional patents. [Method/process] Based on invented patent information from 1985 to 2020 in Yangzhou area, this paper researched the development and evolution of regional patents by using complex network method, and got respective results of patentee cooperation networks and the IPC technology classification cooperation network of three periods, such as degree distribution of networks, node-pair degree distribution, act-size distribution, clustering coefficient and the homogeneity. [Result/conclusion] Through the analysis of statistical results, this study finds that the cooperation between patentees has not been increased with the growth of the network (patent application volume), and under different periods, there are independent patent holders of most patents. Viewed from the IPC technology classification cooperation network, the vast majority of patents cover two IPC technology fields (according to the IPC classification number category), the intersection of technology field of patents also did not strengthen with the development of the network. In addition, the project size of the IPC technology classification cooperation network shows a power law distribution at different times in the development of the network, that is, according to the IPC classification number category, the number of patents contained in each IPC classification number indicates that most patents are concentrated on a small number of IPC technology fields.