Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4883240 | Aircraft propeller noise reduction | Philip R. Gliebe | 1989-11-28 |
| 4825648 | Turbofan engine having a split cowl | — | 1989-05-02 |
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4883240 | Aircraft propeller noise reduction | Philip R. Gliebe | 1989-11-28 |
| 4825648 | Turbofan engine having a split cowl | — | 1989-05-02 |