Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9556645 | Apparatus for opening and closing front entrance | Byungman Yoon, Eunsook Lee | 2017-01-31 |
| 9528299 | Digital entrance opening and closing device | Byungman Yoon, Eunsook Lee | 2016-12-27 |