Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6975072 | Ion source with external RF antenna | Ka-Ngo Leung, Qing Ji | 2005-12-13 |
| 4994706 | Field free, directly heated lanthanum boride cathode | Ka-Ngo Leung, David MOUSSA | 1991-02-19 |
| 4795940 | Large area directly heated lanthanum hexaboride cathode structure having predetermined emission profile | Ka-Ngo Leung, Keith C. Gordon, Dean O. Kippenham, Peter Purgalis, David MOUSSA +2 more | 1989-01-03 |