Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4779022 | Cooling structure for a screen grid electron tube such as a transmitter tetrode | Rainer Badenhoop | 1988-10-18 |
| 4720683 | Circuit for preventing retarding field oscillations in electron tubes, especially for a pulse-width modulation stage in transmitters | Jochen Stahl | 1988-01-19 |
| 4302701 | Directly heated cathode for an electron tube with coaxial electrode design | — | 1981-11-24 |