Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4840595 | Electron beam catcher for velocity modulated electron tubes | Wilhelm Bibracher | 1989-06-20 |
| 4803397 | Indirectly heated dispenser metal capillary cathode for electrical discharge devices | Hinrich Heynisch, Erwin Hubner | 1989-02-07 |