Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| RE32907 | Airfoil flap assembly with flap track member | — | 1989-04-18 |
| 4817382 | Turboprop propulsion apparatus | Grazyna Ostrom | 1989-04-04 |
| 4815273 | Single propeller turboprop propulsion apparatus | Grazyna Ostrom | 1989-03-28 |