Issued Patents 2021
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11011338 | Annular cathode for vacuum tube | Alberto Leggieri, François Legrand | 2021-05-18 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11011338 | Annular cathode for vacuum tube | Alberto Leggieri, François Legrand | 2021-05-18 |