Constructing an Enhanced Patent Citation Network by Adding Unused Relevant Patents
Date Issued
2009
Date
2009
Author(s)
Hsieh, Hui-Chen
Abstract
The patent citation analyses rely on the citations between patents, including quality of patents, knowledge flow and spillover, technology development and industrial trend. The inventors record relevant information as prior art but not all the relevant prior studies would be cited as references. Some highly relevant patents may be unused for the citation time lag (CTL). This paper used the bibliographical coupling (BC) and Pareto principle to identify the unused relevant patents (URP). Some of the missing citation links can then be made up by adding the URP and an enhanced patent citation network (EPCN) can be constructed by taking the URP into account. The patent citation network (PCN) and EPCN were discussed at patent and assignee level in this paper. The differences between the two networks were studied through the Freeman vertex betweenness centrality and the Johnson’s hierarchical clustering. The light emitting diode (LED) illuminating technology was chosen for case study in this paper in order to demonstrate the feasibility of the research methodology. As shown in this work, the relationship between patents can be enhanced by adding the URP.
Subjects
patent citation network
unused relevant
citation time lag
bibliographical coupling
Pareto principle
Freeman vertex betweenness centrality
Type
thesis
File(s)![Thumbnail Image]()
Loading...
Name
ntu-98-R96546001-1.pdf
Size
23.53 KB
Format
Adobe PDF
Checksum
(MD5):155a9b0fb9e5bb99ee6429a771aea2eb