Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5938838 | VCR head drum coated with diamond-like hard carbon films and the method and apparatus for manufacturing the same | Kwang Ryeol Lee, Kwang Yong Eun | 1999-08-17 |
| 5768046 | VCR head drum coated with diamond-like hard carbon films and the method and apparatus for manufacturing the same | Kwang Ryeol Lee, Kwang Yong Eun | 1998-06-16 |
| 5695565 | VCR head drum coated with diamond-like hard carbon films and the method and apparatus for manufacturing the same | Kwang Ryeol Lee, Kwang Yong Eun | 1997-12-09 |