Issued Patents 1982
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4310777 | Directly heated cathode for electron tube | Hiroshi Fukushima, Ko Soeno, Hisashi Ando, Shigehiko Yamamoto | 1982-01-12 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4310777 | Directly heated cathode for electron tube | Hiroshi Fukushima, Ko Soeno, Hisashi Ando, Shigehiko Yamamoto | 1982-01-12 |