Issued Patents 2016
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9452304 | Non-directional smoke control damper having chain gear type blade advancing/retreating device | Hyung Kyou Ryu | 2016-09-27 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9452304 | Non-directional smoke control damper having chain gear type blade advancing/retreating device | Hyung Kyou Ryu | 2016-09-27 |