Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6931187 | Mode-filtering and mode-selecting method in multi-mode waveguide, and waveguide amplifier, semiconductor laser, and VCSEL using the method | Duck Young Kim, Yong-Woo Park, Nak Hyun Sung | 2005-08-16 |
| 6721058 | Apparatus for and method of measuring thickness of materials using the focal length of a lensed fiber | Duck Young Kim, Yong-Woo Park, Nak Hyoun Sung | 2004-04-13 |