Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4803398 | Electron gun with one directly heatable and one indirectly heatable cathode | Horst Ranke | 1989-02-07 |
| 4728850 | Mounting means for mounting spiral wire cathodes | Horst Ranke | 1988-03-01 |