Inter-organizational Knowledge Flow and R&D portfolio of Patent Citation Network - The Case of the Socket Wrench Industry

Manufacturers invest in research and development, absorb the technical knowledge of competing operators, to become the core competencies, and further construct a different portfolio of technical capacities. This study, from the perspective of patent statistics, examines retrieved patent information and formulates patent statistics to use patent backward citation, then group the information of the knowledge betweenness is obtained. The patent between the citation network and the relative citation propensity in order to measure the source of technology and direction of movement, explore the industrial technical competitive advantages of Socket Wrench Industry. This study analyzes the strengths and weaknesses of the research and development portfolio of knowledge betweenness of Socket Wrench Industry. Knowledge betweenness companies can effectively monitor their own technical capabilities, and technological advantages to adjust the direction of R&D.