Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4795940 | Large area directly heated lanthanum hexaboride cathode structure having predetermined emission profile | Ka-Ngo Leung, Keith C. Gordon, Dean O. Kippenham, Peter Purgalis, Malcom D. Williams +2 more | 1989-01-03 |