Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5370156 | Reduced noise valve stop | Mark E. Marler, Keshava B. Kumar | 1994-12-06 |
| 4452335 | Sound absorbing structure for a gas turbine engine | Douglas C. Mathews | 1984-06-05 |
| 4189027 | Sound suppressor liners | Lee W. Dean, III | 1980-02-19 |