Issued Patents 1997
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5680011 | Cold cathode density-modulated type electron gun and microwave tube using the same | — | 1997-10-21 |
| 5650688 | Field emission cold cathode element having exposed substrate | Keizo Yamada, Hironori Imura | 1997-07-22 |
| 5648698 | Field emission cold cathode element having exposed substrate | Keizo Yamada, Hironori Imura | 1997-07-15 |
| 5635789 | Cold cathode | Keizo Yamada, Hironori Imura | 1997-06-03 |
| 5604401 | Field-emission cold cathode for dual-mode operation useable in a microwave tube | — | 1997-02-18 |