| Patents for F01N 1 - Silencing apparatus characterised by method of silencing (8,998) |
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| 09/27/1990 | DE3926921A1 Auspuffanlage fuer eine brennkraftmaschine Exhaust system for an internal combustion engine |
| 09/26/1990 | EP0389401A1 Silencer for automobile exhaust systems |
| 09/26/1990 | CN2062891U High efficient silencer with multiple chambers |
| 09/25/1990 | US4958701 Stamp formed muffler with pocket-free baffle crease |
| 09/19/1990 | EP0373188A4 Active sound attenuation system for engine exhaust systems and the like |
| 09/18/1990 | US4957517 Sound attenuating liquid-gas separator |
| 09/12/1990 | EP0385997A1 Exhaust system for a combustion engine |
| 09/04/1990 | US4953660 Muffler with two part housing and flow tubes |
| 09/04/1990 | US4953659 Fluid blow-off muffler |
| 08/30/1990 | DE3943372A1 Schalldaempfer fuer ein fahrzeug-abgassystem Silencer for a vehicle-exhaust system |
| 08/28/1990 | US4952182 Noise attenuating exhaust relief system for an outboard motor |
| 08/23/1990 | WO1990009523A1 Screw rotor machine comprising a sound silencing device |
| 08/22/1990 | CN2060818U Exhaust dissipative muffler |
| 08/22/1990 | CN2060817U Exhaust silencing apparatus of internal combustion engine |
| 08/21/1990 | US4949807 Engine exhaust muffler apparatus |
| 08/14/1990 | US4947957 Regenerable desiccant cartridge for automotive muffler |
| 08/14/1990 | CA1272687A1 Exhaust silencer for high-power gas turbines |
| 08/08/1990 | CN2060182U Vortex muffler |
| 08/07/1990 | US4947435 Method of transfer function generation and active noise cancellation in a vibrating system |
| 08/07/1990 | US4947356 Aircraft cabin noise control apparatus |
| 08/01/1990 | EP0380394A1 Exhaust gas silencer and exhaust section including such a silencer |
| 08/01/1990 | EP0379675A1 Light weight hybrid exhaust muffler and method of manufacture |
| 07/17/1990 | US4941545 Muffler assembly |
| 07/17/1990 | US4941319 Engine control device |
| 07/11/1990 | EP0377422A1 Exhaust muffler for marine engines |
| 07/11/1990 | CN1043772A Exhaust muffler for internal combustion engine |
| 07/04/1990 | CA2005894A1 Exhaust muffler for marine engines |
| 06/28/1990 | DE3843826A1 Silencer |
| 06/27/1990 | EP0374349A1 Stamp formed muffler with nonplanar array of tubes |
| 06/26/1990 | US4936413 In-line noise attenuation device for a gas conduit |
| 06/20/1990 | EP0373188A1 Exhaust gas muffler arrangement for combustion engine. |
| 06/19/1990 | US4934483 Method of reducing the overflying noise of airplanes having a propeller driven by a piston engine |
| 06/19/1990 | US4934343 For insertion into a gas-carrying conduit |
| 06/13/1990 | EP0372482A1 Muffler |
| 06/12/1990 | US4932364 Internal combustion engine |
| 06/12/1990 | CA1270205A1 Stamp formed muffler |
| 06/06/1990 | CN2057959U Automotive purifying silencer |
| 06/05/1990 | US4930597 Noise attenuation apparatus |
| 05/30/1990 | CN2057699U Motorcycle silencer |
| 05/23/1990 | DE3838798A1 Injector for combined use |
| 05/23/1990 | CN2057461U Inverting type silencer |
| 05/22/1990 | US4926638 Negative pressure air stream accelerator of suction type air cooling mechanism for internal combustion engine |
| 05/22/1990 | US4926637 Exhaust configuration |
| 05/22/1990 | US4926636 Engine-control apparatus |
| 05/22/1990 | US4926635 Exhaust system for multi-cylinder engine |
| 05/22/1990 | CA1269334A1 Compact muffler apparatus and associated methods |
| 05/16/1990 | CN2057220U Purifying and sound eliminating device of exhaust for motor vehicle |
| 05/15/1990 | US4924968 Stamp formed muffler with reinforced outer shell |
| 05/15/1990 | US4924966 Muffler |
| 05/08/1990 | US4923035 Low-frequency muffler |
| 05/08/1990 | US4923033 Heating device, particularly automotive heating device, with an integrated muffler |
| 05/03/1990 | WO1990004706A1 In-line constricted sound-attenuating system |
| 05/03/1990 | DE3836589A1 Compact silencer for commercial vehicles |
| 05/01/1990 | US4920746 Exhaust system for combustion engines |
| 04/25/1990 | CN2056447U Interference silencer |
| 04/21/1990 | CA2001193A1 In-line constricted sound-attenuating system |
| 04/17/1990 | US4916897 Exhaust gas purifying apparatus built-in to a muffler for a diesel engine |
| 04/12/1990 | DE3933193A1 Small portable IC engine - has T=shaped fuel tank fitting between filter and silencer on underside |
| 04/05/1990 | WO1990003501A1 Self-contained muffler attachment and conversion kit for small two-cycle engines |
| 04/03/1990 | US4913597 Silencer for pneumatic grain conveyor |
| 04/03/1990 | US4913260 Gas silencing system with controlling sound attenuation |
| 04/03/1990 | US4912927 Engine exhaust control system and method |
| 03/29/1990 | DE3838148C1 Exhaust line for a spark ignition internal combustion engine |
| 03/28/1990 | EP0360044A1 Sound damping device for an air conduit |
| 03/28/1990 | CN2055187U Rotational flow type oil economizer |
| 03/27/1990 | US4911262 Muffler |
| 03/27/1990 | US4910960 Exhaust control system on internal combustion engine |
| 03/21/1990 | CN2054830U Decompression through percolation silencer for motor |
| 03/20/1990 | US4909348 Stamp formed exhaust muffler with conformal outer shell |
| 03/20/1990 | US4909347 Exhaust tube |
| 03/20/1990 | US4909034 Low speed back pressure generator for affecting torque of an internal combustion engine |
| 03/14/1990 | EP0358357A1 Engine exhaust control system |
| 03/07/1990 | EP0356607A1 Stamp formed muffler and catalytic converter assembly |
| 03/06/1990 | US4905791 Light weight hybrid exhaust muffler and method of manufacture |
| 03/06/1990 | US4905789 Muffler for blower of air ductwork supply line |
| 02/28/1990 | EP0355605A1 Silencer for exhaust systems |
| 02/27/1990 | US4903486 Performance responsive muffler for internal combustion engines |
| 02/21/1990 | EP0354977A1 Automobile muffler |
| 02/21/1990 | CN2053244U Exhausting silencer for motorcycle engine |
| 02/21/1990 | CN1006923B Microsound exhaust method of diesel (gasoline) generator units |
| 02/20/1990 | US4901816 Light weight hybrid exhaust muffler |
| 02/20/1990 | US4901528 System for suppressing noise due to exhaust gas from motor vehicle |
| 02/14/1990 | CN2052815U Jet muffler for air compressor |
| 02/14/1990 | CN2052814U Exhuast muffler for diesel engine |
| 02/08/1990 | WO1990001109A1 Silencer for combustion exhaust gas |
| 02/08/1990 | DE3925022A1 Exhaust gas system for two=stroke engine - involves positioning of after burner in exhaust pipe |
| 02/07/1990 | EP0353761A1 Exhaust gas noise muffler |
| 02/07/1990 | EP0353411A2 Heating system for a motor vehicle provided with an air-cooled rear engine |
| 02/06/1990 | CA1265396A1 Soundproofing casing for pneumatic percussion drill |
| 01/30/1990 | US4896503 Muffling and purifying device for combustion gases of general application |
| 01/25/1990 | WO1990000674A1 Muffler |
| 01/23/1990 | US4894987 Stamp formed muffler and catalytic converter assembly |
| 01/11/1990 | DE3922139A1 Device for noise reduction |
| 01/09/1990 | US4892168 Noise attenuating device |
| 01/09/1990 | CA1264300A1 Exhaust silencer for internal combustion engines |
| 01/02/1990 | US4890691 Muffler |
| 12/28/1989 | WO1989012733A1 An exhaust silencer |
| 12/28/1989 | WO1989012732A1 An exhaust silencer and a method of manufacturing it |
| 12/27/1989 | CN2050075U Safe energy-saving dissipative muffler for internal combustion engine exhaust |
| 12/20/1989 | CN2049679U Smoke exhausting and noise silencing device |