論文

• Yoshinori Tsurusaki, Yoshitoshi Tanaka. Defining the technical roadmap in filtering technology for hydraulic excavators using customers' patent information, International Journal of Liability and Scientific Enquiry, Vol. 7, pp. 32-48, Jan. 2014.
• Yoshinori Tsurusaki, Yoshitoshi Tanaka. Defining the technical roadmap in filtering technology for hydraulic excavators using customers' patent information, IAITL 2013, International Association of IT Lawyers (IAITL), pp. 738-752, Dec. 2013.

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