Issued Patents 1994
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5365025 | Low backpressure straight-through reactive and dissipative muffler | Leon A. Kraai, William E. Hill | 1994-11-15 |
| 5350888 | Broad band low frequency passive muffler | Leon A. Kraai | 1994-09-27 |