Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5482681 | Catalytic converter for motor vehicles | — | 1996-01-09 |
| 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 |
| 5200582 | Passive muffler for low pass frequencies | Leon A. Kraai | 1993-04-06 |
| 4655035 | Auxiliary air injector assembly | — | 1987-04-07 |