| 2025/0067,202 | ACOUSTIC EFFICIENCY | Aug 20, 24 | Feb 27, 25 | Not available |
| 2025/0043,706 | CONVERTIBLE SILENCER | Jul 29, 24 | Feb 06, 25 | Not available |
| 2024/0286,726 | EXHAUST HANDLING SYSTEMS FOR MARINE VESSELS AND RELATED METHODS | May 10, 24 | Aug 29, 24 | Not available |
| 2024/0167,405 | EXHAUST VALVE AND METHOD FOR MANUFACTURING SAME | Mar 26, 21 | May 23, 24 | Sankei Giken Kogyo Co. Ltd. |
| 2024/0044,274 | ENGINE ASSEMBLY FOR A VEHICLE HAVING A HYDROCARBON TRAP | Dec 17, 21 | Feb 08, 24 | Not available |
| 2023/0374,923 | MUFFLER SYSTEM WITH PNEUMATICALLY ACTUATED BYPASS VALVE | May 17, 23 | Nov 23, 23 | Not available |
| 2023/0280,744 | REMOTE CONTROLLED ENGINE REVVING | May 10, 23 | Sep 07, 23 | Not available |
| 2023/0212,968 | EXHAUST SILENCING DEVICE AND SYSTEM, VEHICLE, AND EXHAUST SILENCING METHOD | Jul 14, 20 | Jul 06, 23 | Not available |
| 2023/0193,796 | MUFFLER VALVE AND MUFFLER | Mar 22, 21 | Jun 22, 23 | Sankei Giken Kogyo Co. Ltd. |
| 2023/0147,854 | METHODS AND SYSTEM FOR DE-ICING A VALVE OF AN EXHAUST SYSTEM | Nov 05, 21 | May 11, 23 | Not available |
| 2022/0356,823 | AFTER-MARKET REPLACEMENT KIT TO TEMPORARILY BYPASS A VEHICLE'S MUFFLER SILENCER RESONATORS TO IMPROVE EXHAUST SOUND, PERFORMANCE, FUEL ECONOMY AND OTHER CHARACTERISTICS | May 05, 21 | Nov 10, 22 | Fabspeed.com, Inc. |
| 2022/0316,371 | DUAL FUNCTION EXHAUST SYSTEM ATTACHMENT | Mar 31, 21 | Oct 06, 22 | Not available |
| 2022/0298,941 | EXHAUST SOUND TUNING SYSTEM AND METHOD | Mar 16, 21 | Sep 22, 22 | Not available |
| 2022/0205,376 | EXHAUST SYSTEM FOR AN INTERNAL COMBUSTION ENGINE | Nov 10, 21 | Jun 30, 22 | Not available |
| 2022/0205,377 | CAR PROVIDED WITH AN EXHAUST SYSTEM WITH AERODYNAMIC EFFECT | Nov 10, 21 | Jun 30, 22 | Not available |
| 2022/0099,007 | EXHAUST SYSTEM | Sep 28, 20 | Mar 31, 22 | Not available |
| 2022/0056,827 | METHOD FOR INTERLOCKING ENGINE EXHAUST SOUND WITH TRAVELING MODE AND EXHAUST SYSTEM FOR SMART VEHICLE | Jan 06, 21 | Feb 24, 22 | Hyundai Motor Company; Kia Motors Corporation; |
| 2022/0049,635 | GAS FLOW AND SOUND CONTROL VALVE FOR EXHAUST GAS SYSTEM | Nov 15, 19 | Feb 17, 22 | Not available |
| 2021/0222,595 | EXHAUST TUNING SYSTEM AND METHOD | Jan 22, 20 | Jul 22, 21 | Not available |
| 2021/0148,262 | MULTI-MODE EXHAUST MUFFLER | Nov 15, 19 | May 20, 21 | Not available |