Issued Patents 2003
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6641450 | Method of making a cathode for an electron tube | Dong Hee Han, Seung Han | 2003-11-04 |
| 6626726 | Method for fabricating cathode structure for cathode ray tube | Ji-Hoon Ahn, Bu-chul Shin | 2003-09-30 |