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29 197 Christensen & Clayton M., The Innovator s Dilemma: When New Technologies Cause Great Firms to Fail, Boston: Harvard Business Press, Abernathy, William J. & Clark, Kim. B, Innovation: mapping the winds of creative destruction Research Policy, Vol.14 No.1(1985). Alan H. & Cheetham Josph E. Hazel, Binary similarity coefficients, Journal of Paleontology, Vol.43 No.5(1969). D. Billsus & M. J. Pazzani, Learning Collaborative Information Filters, Proc. International Conference on Machine Learning(1998). Klevorick, Alvin K, et al., On the sources and significance of interindustry differences in technological opportunities, Research Policy, Vol.24 No.2(1995). Lee, Sungjoo, et al., An approach to discovering new technology

30 198 opportunities: Keyword-based patent map approach Technovation, Vol.29 No.6-7(2009). M.B. Albert et al., Direct validation of citation counts as indicators of industrially important patents, Research Policy, Vol.20 No.3(1991). Manuel Trantenberg, A penny for your Quotes; Patent Citations and the Value f Innovations, The RAND Journal of Economics, Vol.21, No.1(1990). M.M.S. Karki, Patent citation analysis: A policy analysis tool, World Patent Information, Vol.19, No.4(1997). Mulvenna, M, et al., Personalization on the Net Using Web Mining : Introduction, Communications of the ACM, Vol.43 No.8(2000). Narin, F., Patent bibliometrics, Scientometrics, Vol.30 No.1(1994). Olsson, Ola, Technological opportunity and growth, Journal of Economic Growth, Vol.10 No.1(2005). Park, Hyunseok et al., A patent intelligence system for strategic technology planning, Expert system with Applications, Vol.40 No.7(2013). PHILIPP M. SCHLÜTER & STEPHEN A. HARRIS, Analysis of multilocus fingerprinting data sets containing missing data, Molecular Ecology Notes, Vol.6 No.2(2006). Qing Li, et al., A Probabilistic Model for Music Recommendation Considering Audio Features, Lecture Notes in Computer Science, Vol.3689(2005) Renick, P. & Varian, H.R., Recommender System, Communication of the ACM, Vol.40 No.3(1997). X. Su & T. M. Khoshgoftaar, A Survey of Collaborative Filtering Techniques, Advances in Artificial Intelligence, No.4(2009). Yoon, B. & Park, Y., A systematic approach for identifying technology opportunities: Keyword-based morphology analysis Technological Forecastingand Social Change, Vol.72 No.2(2005). Yoon, B., On the development of a technology intelligence tool for identifying technology opportunity", Expert Systems with

31 199 Applications, Vol.35 No1-2(2008). Yoon, J. & Kim, K., Detecting signals of new technological opportunities using semantic patent analysis and outlier detection, Scientometrics, Vol.90 No.2(2012)., Identifying rapidly evolving technological trends for R&D planning using SAO-based semantic patent networks, Scientometrics, Vol.88 No.1(2011). Zha, X. & Chen, M., Study on early warming of competitive technical intelligence based on the patent map, Journal of computer, Vol.5 No.2(2012).

32 200 The Journal of Intellectual Property Vol.10 No.1 March 2015 A Patent Recommendation Method For Technology Opportunity Exploration Using Firms Own Patents: the Case of 3D Printing Youngjin Park, Namuk Ko & Janghyeok Yoon Abstract Under the competitive technological environment where the life cycles for products and technologies shorten, discovering and preoccupying potential technology opportunities help firms secure the competitiveness and develop sustainably. Prior studies using patent citations have focused on identifying and forecasting technological trends, whereas they have hardly addressed how to identify technology opportunities using firms own patents. Therefore, this study proposes a collaborative filtering-based approach to recommend patents that act as input of follow-up technology opportunities that a target firm can develop. The approach is illustrated using patents of 3D printing technology and their citation information. We expect that the proposed approach contributes to identifying the technology opportunities favorable to a target firm s existing technological capability as well as less competitive in the firm s technology field. Further, it will be incorporated into the processes to explore and participate in new technology markets. Keywords technology opportunity, patent citation, collaborative filtering, firm s own patent, 3D printing

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06_ÀÌ¼º»ó_0929 150 151 alternative investment 1) 2) 152 NPE platform invention capital 3) 153 sale and license back 4) 154 5) 6) 7) 155 social welfare 8) 156 GDP 9) 10) 157 Patent Box Griffith EUROSTAT 11) OTC M&A 12)