Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4693950 | Secondary lithium cell | Vesselin Manev, Bogdana L. Puresheva | 1987-09-15 |
| 4234623 | Method for the production of membrane battery separators | Hrisanta N. Budevska, Latinka T. Ivanova, Radka D. Yankova | 1980-11-18 |