| 2618355 | Muffler with single outlet opening elongated in a direction parallel to the axis of the inlet opening | |||
| 2583366 | Muffler with perforated cylinder containing inwardly and rearwardly inclined holes | |||
| 2519160 | Testing apparatus with sound absorbing panels forming air passages | |||
| 2356782 | Internal-combustion engine exhaust system | |||
| 2297425 | Exhaust conduit assembly | |||
| 2078754 | Silencer | |||
| 2056608 | Silencer | |||
| 1927213 | Silencer | |||
| 1294475 | N/A | |||
| 1196382 | N/A | |||
| 0821828 | N/A |
| GB449187A |