| 9719389 | System and method for reducing cold start emissions using an active exhaust throttle valve and an exhaust gas recirculation loop | Jun 01, 15 | Aug 01, 17 | GM GLOBAL TECHNOLOGY OPERATIONS LLC |
| 9677438 | Exhaust flow valve with revrumble feature | Oct 19, 15 | Jun 13, 17 | GM GLOBAL TECHNOLOGY OPERATIONS LLC |
| 9587537 | Triple baffled muffler | Dec 02, 15 | Mar 07, 17 | Not available |
| 9447715 | Valve device for exhaust gas flow path | Feb 20, 13 | Sep 20, 16 | FUTABA INDUSTRIAL CO., LTD. |
| 9291157 | Automated system for pressure pulsation dampening | Dec 09, 13 | Mar 22, 16 | Not available |
| 9255502 | Engine with exhaust system and external acoustic emissions valve | Aug 15, 14 | Feb 09, 16 | NORTHWEST ULD, INC. DBA NORTHWEST UAV PROPULSION SYSTEMS |
| 9188089 | Engine apparatus | Dec 26, 12 | Nov 17, 15 | YANMAR CO., LTD. |
| 9145813 | Structure for utilizing exhaust heat of vehicle | Dec 29, 13 | Sep 29, 15 | HYUNDAI MOTOR COMPANY |
| 8961667 | Radial counterflow muffler for NO reduction and pollutant collection | Feb 01, 12 | Feb 24, 15 | MCCUTCHEN CO. |
| 8943797 | Cylinder head with symmetric intake and exhaust passages | Jan 17, 12 | Feb 03, 15 | GM GLOBAL TECHNOLOGY OPERATIONS LLC |
| 8931590 | Exhaust system component for a motor vehicle | Jan 12, 12 | Jan 13, 15 | GM GLOBAL TECHNOLOGY OPERATIONS LLC |
| 8453438 | Exhaust control device for vehicle engine | Sep 25, 08 | Jun 04, 13 | HONDA MOTOR CO., LTD. |
| 8256402 | Exhaust passage structure of multi-cylinder engine | Jan 22, 10 | Sep 04, 12 | MAZDA MOTOR CORPORATION |
| 7779822 | Intake assembly with integral resonators | Jan 12, 07 | Aug 24, 10 | GM GLOBAL TECHNOLOGY OPERATIONS LLC |
| 7686130 | Dual mode vehicle exhaust system and associated method | Aug 21, 07 | Mar 30, 10 | Not available |
| 7584821 | Adjustable helmholtz resonator | Jan 23, 07 | Sep 08, 09 | GM GLOBAL TECHNOLOGY OPERATIONS LLC |
| 6758042 | Exhaust device with an electric generator | Apr 16, 03 | Jul 06, 04 | Not available |
| 6637545 | Silencer | Jul 01, 02 | Oct 28, 03 | Not available |
| 6053987 | Method and an apparatus for cleaning a flame detector of a combustor | Mar 05, 98 | Apr 25, 00 | MITSUBISHI HITACHI POWER SYSTEMS, LTD. |
| 5884666 | Exhaust pipe extension | Apr 14, 98 | Mar 23, 99 | Not available |