Issued Patents 2021
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11118969 | Electron tube comprising a focusing electrode part having a light passage portion and an electron passage portion | Yasuyuki Egawa, Shigeru Ichikawa, Yasuharu Negi | 2021-09-14 |