Document (#38354)

Author
Huang, M.-H.
Huang, W.-T.
Chang, C.-C.
Chen, D. Z.
Lin, C.-P.
Title
The greater scattering phenomenon beyond Bradford's law in patent citation
Source
Journal of the Association for Information Science and Technology. 65(2014) no.9, S.1917-1928
Year
2014
Abstract
Patent analysis has become important for management as it offers timely and valuable information to evaluate R&D performance and identify the prospects of patents. This study explores the scattering patterns of patent impact based on citations in 3 distinct technological areas, the liquid crystal, semiconductor, and drug technological areas, to identify the core patents in each area. The research follows the approach from Bradford's law, which equally divides total citations into 3 zones. While the result suggests that the scattering of patent citations corresponded with features of Bradford's law, the proportion of patents in the 3 zones did not match the proportion as proposed by the law. As a result, the study shows that the distributions of citations in all 3 areas were more concentrated than what Bradford's law proposed. The Groos (1967) droop was also presented by the scattering of patent citations, and the growth rate of cumulative citation decreased in the third zone.
Theme
Informetrie
Field
Patentinformation
Object
Bradford-Gesetz

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