Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4494078 | Class BC power amplifier | Vassil M. Sofiyanski | 1985-01-15 |
| 4481482 | Class BC power amplifier | Vassil M. Sofiyanski, Boris V. Vassilev, Panayot Y. Danchev, Angel B. Angelov, Yordan M. Strandjaliev +1 more | 1984-11-06 |