Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4803398 | Electron gun with one directly heatable and one indirectly heatable cathode | Horst Ranke | 1989-02-07 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4803398 | Electron gun with one directly heatable and one indirectly heatable cathode | Horst Ranke | 1989-02-07 |