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3Tijain pohopŏp p'allye yŏn'gu = Case study on the design protection act /디자인 보호법 판례 연구 = Case study on the design protection act /Published 2019Other Authors: “...Chŏng, Ch'a-ho...”
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4Chingmu palmyŏng chedo haesŏl /직무발명제도해설 /Published 2015Other Authors: “...Chŏng, Ch'a-ho...”
Book