Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5982083 | Cathode for electron tube | Jong-Seo Choi, Keun Bae Kim, Kwang-Min Lee, Kwi-Seok Choi, Su Chan LEE +1 more | 1999-11-09 |
| 5698937 | Cathode for electron tube | Jong-Seo Choi, Keun Bae Kim, Kwang-Min Lee, Kwi-Seok Choi | 1997-12-16 |
| 5548184 | Oxide cathode employing Ba evaporation restraining layer | Kwi-Seok Choi, Jong-Seo Choi, Kyung-cheon Shon, Sang Won Lee | 1996-08-20 |
| 5519280 | Oxide cathode | Kyung-cheon Shon, Jong-Seo Choi, Kwi-Seok Choi, Sang Won Lee | 1996-05-21 |