4. Patents 목록으로 돌아가기
10-2020-0178717 (2020.12.18) / 10-2435813 (2022.08.19)
10-2015-0142448 (2015.10.12) / 10-1710613 (2017.02.21)
10-2013-0146893 (2013.11.29) / 10-1543417 (2015.08.04)
10-2020-0178718 (2020.12.18) / 10-2435815 (2022.08.19)