최준혁, 허 진, 고국환, 권영열 “모형 기관차의 자동운행 제어장치 및 방법”, 특허출원 제 2007-082573호 (2007/08/17)
Jun-Hyuk Choi, Jin Hur, Kuk-Hwan Ko, Young-Yeul Kwon,
"Apparatus and method for controlling automatic travel of model locomotive",
Patent application 2007-082573 (2007/08/17)
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