| Patents for F01N 1 - Silencing apparatus characterised by method of silencing (8,998) |
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| 05/12/1999 | CN2318403Y Feedback diffusion noise silencing apparatus |
| 05/11/1999 | US5902971 Muffler for internal combustion engine |
| 05/11/1999 | US5902970 Muffler for internal combustion engines, especially in aviation of improved geometry and material |
| 05/06/1999 | DE19747914A1 Exhaust gas silencer for two-stroke internal combustion engine |
| 05/05/1999 | CN2317312Y Air purifying silencer for air compressor |
| 05/05/1999 | CN1215795A Gas turbine exhaust passage and damper system for same |
| 05/04/1999 | US5899063 Water-cooled catalyst system |
| 05/04/1999 | CA2151103C Stamp formed muffler with siphon tube |
| 04/28/1999 | EP0911497A2 Sheet metal member conveying exhaust gas of a motor vehicle exhaust system, especially folded muffler |
| 04/27/1999 | US5898140 Exhaust silencing device |
| 04/27/1999 | US5897843 Exhaust gas purifier |
| 04/22/1999 | WO1998014693A9 Gas flow silencer |
| 04/21/1999 | CN2315302Y Light transmitting soft voice insulation cover |
| 04/15/1999 | WO1999018334A1 Waste gas heat exchanger |
| 04/13/1999 | US5894115 Exhaust system apparatus and noise suppression method |
| 04/08/1999 | WO1999017012A1 Silencer with a bypass resonator |
| 04/08/1999 | WO1998039209A9 Sound reduction method and system for jet engines |
| 04/08/1999 | DE19745681A1 Piston engine exhaust silencer especially for aircraft piston engines |
| 04/08/1999 | DE19744179A1 Exhaust muffler component-cells |
| 04/08/1999 | DE19744178A1 Exhaust gas heat exchanger with integral silencers for thermal power stations |
| 04/08/1999 | DE19743482A1 Schalldämpfer mit einem Nebenschlußresonator Muffler with a shunt resonator |
| 04/07/1999 | CN2313049Y Silencer for gas-exhausting system of internal combustion engine |
| 04/07/1999 | CN2313048Y Membrane-cavity resonant silencer for cooling tower |
| 04/07/1999 | CN2313047Y 消音器 Silencer |
| 04/06/1999 | US5892186 Muffler with gas-dispersing shell and sound-absorption layers |
| 04/06/1999 | CA2131346C Jet pump exhaust system |
| 03/31/1999 | EP0738370A4 Turbine sound reducer |
| 03/31/1999 | CN2312330Y Exhaust silencing apparatus for internal combustion engine |
| 03/25/1999 | WO1999014484A1 Intake-exhaust manifold bridge noise attenuation system and method |
| 03/25/1999 | DE19751940C1 Intake silencer for motor vehicle internal combustion engine |
| 03/24/1999 | CN2311611Y Cyclotron muffler |
| 03/24/1999 | CN2311610Y Multi-hole center silencing purifier |
| 03/23/1999 | US5884898 Butterfly valve for hot fluid |
| 03/18/1999 | WO1999013274A1 An improved sound attenuating device |
| 03/17/1999 | EP0902171A2 Muffler |
| 03/16/1999 | US5881941 Stapler having a silencer |
| 03/16/1999 | US5881554 Integrated manifold, muffler, and catalyst device |
| 03/11/1999 | WO1999011938A1 Pulsation damper |
| 03/10/1999 | CN1210198A Two stroke engine silencing device |
| 03/04/1999 | DE19756468C1 Eddy current noise insulator |
| 03/03/1999 | EP0898643A1 Silencer |
| 03/03/1999 | CN2309425Y Divided delay-action silencing apparatus |
| 03/03/1999 | CN1209852A Soundabsorbing element and procedure for manufacture of same and use thereof |
| 03/02/1999 | US5877461 Muffler |
| 02/25/1999 | WO1999009305A1 Noise attenuating apparatus |
| 02/24/1999 | CN2308711Y Airflow rotary silencer |
| 02/23/1999 | CA2180272C Turbine sound reducer |
| 02/18/1999 | WO1999007983A1 Marine engine silencing apparatus and method |
| 02/18/1999 | WO1998039209A3 Sound reduction method and system for jet engines |
| 02/16/1999 | CA2151354C Stamp formed muffler with nested chambers |
| 02/10/1999 | EP0895562A1 Exhaust assembly for use with combustion engines, and vehicle provided with such assembly |
| 02/10/1999 | CN2307106Y Energy-saving silencer for motor-driven vehicle |
| 02/09/1999 | US5869793 Oval shaped spark arresting muffler for engines |
| 02/09/1999 | US5869792 For use in a duct having opposed, upstanding sidewalls |
| 02/02/1999 | US5866860 Muffler having a pressure adjusting device |
| 02/02/1999 | US5866859 Spark arresting structure for a muffler having a catalytic converter |
| 02/02/1999 | CA2012987C Marine engine exhaust system and method |
| 01/21/1999 | WO1999002826A1 Modular silencer |
| 01/19/1999 | US5860400 Intake-exhaust manifold bridge noise attenuation system and method |
| 01/19/1999 | CA2126579C Compression release for an internal combustion engine |
| 01/12/1999 | US5859394 Muffler with stamped internal plates defining tubes and separating chambers |
| 01/12/1999 | US5859393 Reduced cost vent silencer |
| 01/12/1999 | US5857327 Muffler for an internal combustion engine |
| 01/07/1999 | EP0888493A1 Exhaust silencer arrangement |
| 01/07/1999 | DE19817026A1 Motor cycle retro-fit exhaust silencer |
| 01/06/1999 | CN2303086Y Exhaust tail tube of internal combustion engine |
| 01/06/1999 | CN1204000A Combined soundproofing box for combustion machine set of fuel-oil and gas-fired boiler |
| 12/30/1998 | CN2302338Y Trapezoidal narrow seam microporous plate type internal combustion engine noise muffler |
| 12/23/1998 | WO1998058165A1 Tube end closure |
| 12/23/1998 | WO1998058162A1 Exhaust gases muffler of internal combustion engine |
| 12/23/1998 | EP0886045A1 Exhaust system with seamed roll joints |
| 12/17/1998 | WO1998056576A1 Flexible corrugated multilayer metal foil shields and method of making |
| 12/17/1998 | WO1998056573A1 Shaped multilayer metal foil shield structures and method of making |
| 12/16/1998 | EP0884456A2 Muffler |
| 12/16/1998 | EP0884429A1 Metallic structure, consisting of two facings and an internal core, and a silencer made from this structure |
| 12/16/1998 | CN2300730Y Environmental protection type device capable of converting engine noise into music |
| 12/10/1998 | DE19825762A1 Geformte mehrschichtige Metallfolien-Abschirmstrukturen und Verfahren zu ihrer Herstellung Shaped multilayer metal foil shield structures and processes for their preparation |
| 12/09/1998 | CN1201104A Accelerated exhausting device |
| 12/08/1998 | US5848168 Active noise conditioning system |
| 12/08/1998 | US5847334 Silencer mechanism for use in an impact wrench |
| 12/03/1998 | WO1998054693A1 Muffler |
| 12/03/1998 | WO1998054445A1 Silencer casing and pertaining catalyst support with a retaining element and method for the production thereof |
| 12/03/1998 | DE19743446A1 Exhaust silencing system for internal combustion engine |
| 12/03/1998 | DE19722202A1 Schalldämpfergehäuse und zugehöriger Katalysator-Trägerkörper mit Halteelement sowie Verfahren zu dessen Herstellung Muffler housing and associated catalyst carrier body with a retaining element and process for its preparation |
| 12/02/1998 | EP0881423A1 Heat-shield with sound insulation |
| 12/02/1998 | CN2299155Y Division impedance decompression silencer |
| 12/01/1998 | US5844178 For an internal combustion engine |
| 11/25/1998 | EP0879937A1 Silencer group for muffler of internal combustion engines |
| 11/25/1998 | CN2298347Y Explosion-proof silencer |
| 11/24/1998 | US5841080 For use with a power blower |
| 11/24/1998 | CA2123776C Narrow width stamp formed muffler |
| 11/19/1998 | DE19715559C1 Silencer for heating installation |
| 11/13/1998 | CA2222052A1 Acoustic muffler |
| 11/11/1998 | EP0876539A1 Soundabsorbing element and procedure for manufacture of this element and use of this element |
| 11/10/1998 | US5835605 Engine exhaust sound synthesizer |
| 11/10/1998 | US5832720 Method for utilizing a silencer unit and an arrangement for applying the method in a large diesel engine |
| 11/04/1998 | EP0707737B1 Active sound damper |
| 11/04/1998 | CN2296404Y Low resistance high efficiency silencer |
| 11/04/1998 | CN2296403Y Secondary air noise reducing device for motorcycle |
| 11/04/1998 | CN1197886A Vehicular silencer |