Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4449680 | Aerodynamically contoured, low drag wing engine and engine nacelle combination | Louis B. Gratzer | 1984-05-22 |
| 4449681 | Aerodynamically contoured, low drag wing, engine and engine nacelle combination | Louis B. Gratzer | 1984-05-22 |
| 4449682 | Aerodynamically contoured, low drag wing, engine and engine nacelle combination | Louis B. Gratzer | 1984-05-22 |
| 4449683 | Aerodynamically contoured, low drag wing engine and engine nacelle combination | Louis B. Gratzer | 1984-05-22 |