Issued Patents All Time
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4980615 | Electron beam control circuit in electron beam evaporators with alternating acceleration voltages | Venzislav I. Valkov, Venzislav G. Dimitrov, Vladimir S. Eterski | 1990-12-25 |