Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7665621 | Self movable crane system with a boom | Nak Ju Doh, Kyung In Kang, Ung-Kyun Lee, Tae Hoon Kim, Sung Hoon An +3 more | 2010-02-23 |
| 5751511 | Capstan phase control method for video cassette tape recorder | Yong-Hoo Sheen, Ji-Yoon Yoo, Sang-Lak Lee | 1998-05-12 |