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The purpose of this paper is to examine the interactions between the focus of R&D and technological areas, and to inquire into the technological network in shaping the technological position from innovative dynamics environment. 2-mode network analysis is employed to explore the question of how R&D activities interact. Our empirical data is from USPTO. We conducted both of network analysis and statistic analysis. We identified some key patents from the network analysis. From the regression analysis, we also found that the impact of centralities is mixed.