Issued Patents 1982
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4349766 | Directly heated cathode for electron tube | Hisashi Ando, Ko Soeno, Akira Misumi, Hiroshi Fukushima | 1982-09-14 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4349766 | Directly heated cathode for electron tube | Hisashi Ando, Ko Soeno, Akira Misumi, Hiroshi Fukushima | 1982-09-14 |