Issued Patents 2004
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6791251 | Metal cathode and indirectly heated cathode assembly having the same | Jong-Seo Choi, Kyoung-Cheon Son, Kyu-Nam Joo, Sung-Hwan Moon, Yoon-Chang Kim +2 more | 2004-09-14 |
| 6762544 | Metal cathode for electron tube | Yoon-Chang Kim, Kyu-Nam Joo, Bu-Chul Sin | 2004-07-13 |