A method to make the genealogical graph of core documents from the directed citation network

Abstract

The larger amount of information and the larger size of search group for a given topic need many time for technicians and researchers in order to figure out the flows of technologies. Many of them want to disclose core technologies for a specific topic and understand historical aspects of the technologies. In this study, we propose a new methodology in directed citation networks, which derives the most influential core patents under both direct and indirect citation viewpoints.