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조준호(Jun-Ho Cho),고효인(Hyo-In Koh),김흥섭(Heung-Sup Kim) 한국철도학회 2010 한국철도학회 학술발표대회논문집 Vol.2010 No.7
In this study, the patent trends for noise barrier and noise reducing device have been analyzed, for the development of adaptive noise barrier according to the transmission characteristics of railway noise. Using patent search engine, keyword searching for patents after 1980 in Korea was performed. The first 667 patents details were reviewed for the extraction core(ie, key) patents. From this review, finally 70 patents were built as DB. From this analysis of core patents, system requirements for development of noise reducing device were obtained.