Issued Patents 2004
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6785449 | Multimode interference coupler, multi-layer optical planar waveguide using the same and method of manufacturing the same | Jong Moo Lee, Doo-Hee Cho, Joon Tae Ahn, Myung Hyun Lee | 2004-08-31 |
| 6769274 | Method of manufacturing a planar waveguide using ion exchange method | Doo-Hee Cho, Joon Tae Ahn, Min Yong Jeon | 2004-08-03 |