Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4979587 | Jet engine noise suppressor | William Hirt, Jack H. Caldwell, Claude R. Stachowiak, Henry A. Kumasaka | 1990-12-25 |
| 4421201 | High efficiency broadband acoustic resonator and absorption panel | Murray D. Nelsen, Robert K. Kunze, Jr., Robert F. Olsen | 1983-12-20 |