Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4847946 | Hydraulic door closer | Sun O. Nam, Jae-young Yoo | 1989-07-18 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4847946 | Hydraulic door closer | Sun O. Nam, Jae-young Yoo | 1989-07-18 |