The greater scattering phenomenon beyond bradford's law in patent citation
Journal
Journal of the Association for Information Science and Technology
Journal Volume
65
Journal Issue
9
Pages
1917-1928
Date Issued
2014
Author(s)
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 B radford's law, which equally divides total citations into 3 zones. While the result suggests that the scattering of patent citations corresponded with features of B radford'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 B radford's law proposed. The G roos (1967) droop was also presented by the scattering of patent citations, and the growth rate of cumulative citation decreased in the third zone.
Type
journal article