Using the comprehensive patent citation network (CPC) to evaluate patent value

Guan-Can Yang, Gang Li, Chun-Ya Li, Yun-Hua Zhao, Jing Zhang, Tong Liu, Dar-Zen Chen () and Mu-Hsuan Huang
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Guan-Can Yang: Institute of Science and Technical Information of China
Gang Li: Wuhan University
Chun-Ya Li: Wuhan University
Yun-Hua Zhao: Institute of Science and Technical Information of China
Jing Zhang: Institute of Science and Technical Information of China
Tong Liu: Beijing Computing Center
Dar-Zen Chen: National Taiwan University
Mu-Hsuan Huang: National Taiwan University

Scientometrics, 2015, vol. 105, issue 3, No 1, 1319-1346

Abstract: Abstracts Most approaches to patent citation network analysis are based on single-patent direct citation relation, which is an incomplete understanding of the nature of knowledge flow between patent pairs, which are incapable of objectively evaluating patent value. In this paper, four types of patent citation networks (direct citation, indirect citation, coupling and co-citation networks) are combined, filtered and recomposed based on relational algebra. Then, a method based on comprehensive patent citation (CPC) network for patent value evaluation is proposed, and empirical study of optical disk technology related patents has been conducted based on this method. The empirical study was carried out in two steps: observation of network characteristics over the entire process (citation time lag and topological and graphics characteristics), and measurement verification by independent proxies of patent value (patent family and patent duration). Our results show that the CPC network retains the advantages of patent direct citation, and performs better on topological structure, graphics features, centrality distribution, citation lag and sensitivity than a direct citation network; The verified results by the patent family and maintenance show that the proposed method covers more valuable patents than the traditional method.

Keywords: Comprehensive patent citation (CPC); Multiple relationships; Patent value evaluation; Relational algebra algorithm (search for similar items in EconPapers)
Date: 2015
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Citations: View citations in EconPapers (16)

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DOI: 10.1007/s11192-015-1763-7

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