Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4814993 | Method and apparatus for the control of fuel consumption in an airplane | Yordan D. Zapryanov, Desho I. Mladenov, Lyudmil K. Mihailov, Kiril H. Kolchakov, Kostadin B. Botev +4 more | 1989-03-21 |