4. Patents 목록으로 돌아가기
10-2019-0098684 (2019.08.13) / 10-2260351 (2021.05.28)
10-2017-0018168 (2017.02.09) / 10-1828369 (2018.02.06)
10-2014-0166389 (2014.11.26) / 10-1688581 (2016.12.15)
10-2013-0044649 (2013.04.23) / 10-1421463 (2014.07.15)