Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5365025 | Low backpressure straight-through reactive and dissipative muffler | Robert L. Sager, Jr., William E. Hill | 1994-11-15 |
| 5350888 | Broad band low frequency passive muffler | Robert L. Sager, Jr. | 1994-09-27 |
| 5200582 | Passive muffler for low pass frequencies | Robert L. Sager, Jr. | 1993-04-06 |