| Patents for F01N 1 - Silencing apparatus characterised by method of silencing (8,998) |
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| 06/19/1991 | EP0432483A1 Catalytic converter arrangement for purification of exhaust gases |
| 06/19/1991 | EP0432233A1 Muffler for a compressed air driven motor |
| 06/19/1991 | CN1052355A Arrangement for catalytic purification of exhaust gases of internal combustion engines, in particular two-stroke engines |
| 06/13/1991 | WO1991008379A1 Dual flow turbine engine muffler |
| 06/12/1991 | EP0431405A1 Device for catalytic purification of exhaust gases of internal combustion two-stroke engines |
| 06/11/1991 | US5022877 Marine exhaust system |
| 06/04/1991 | US5020631 Modular silencer |
| 05/29/1991 | DE3926011A1 Naturally aspirated piston engine - has discrete after-explosion section within silencer |
| 05/29/1991 | CN2077902U Clarifying dissipative-muffler for diesel or gasoline combustion engine |
| 05/22/1991 | WO1991007583A1 In-line noise attenuation device |
| 05/22/1991 | EP0428187A2 Portable engine unit |
| 05/22/1991 | EP0428186A1 Portable engine unit |
| 05/22/1991 | EP0428037A1 Filter for eliminating pollutants |
| 05/22/1991 | CN2077483U Noise-insulation shroud with natural ventilation |
| 05/22/1991 | CN1051615A Jet-whirl type silencing of noise method and device thereof |
| 05/22/1991 | CA2069102A1 In-line noise attenuation device |
| 05/21/1991 | US5016730 Acoustic filter having acoustic isolation of internal flow element |
| 05/21/1991 | US5016729 Exhaust system for combustion engine |
| 05/21/1991 | US5016439 Exhaust system for a small watercraft engine |
| 05/21/1991 | US5016438 Emission control apparatus |
| 05/16/1991 | DE3937604A1 Reciprocating piston IC engine - has silencer with clutch and thrust nozzles for reduced pollution |
| 05/15/1991 | EP0426696A1 An exhaust pipe and a method for manufacturing it |
| 05/15/1991 | CN2077028U Micro pinked plate dissipative muffler |
| 05/15/1991 | CN1051411A Exhaust silencer |
| 05/15/1991 | CN1051410A Exhaust silencer and method of mfg. it |
| 05/15/1991 | CA2029331A1 Filter for the separation of impurities or contaminants |
| 05/14/1991 | US5014817 Engine exhaust apparatus and method |
| 05/14/1991 | US5014816 Silencer for gas induction and exhaust systems |
| 05/14/1991 | US5014512 Acceleration device of exhaust gas stream for an internal combustion engine |
| 05/07/1991 | US5013597 Multi-layered sound-insulating panel for motor vehicles, or similar |
| 05/07/1991 | US5012891 Muffler assembly |
| 04/30/1991 | US5010731 Exhausting apparatus of four-cycle four-cylinder engine |
| 04/25/1991 | DE3935095A1 Particle filter in IC engine exhaust - has inner pipe, closed at one end, with perforation in its surface |
| 04/25/1991 | CA2028349A1 Support structure for engine mufflers |
| 04/23/1991 | US5009857 Filter for gases |
| 04/23/1991 | US5009065 Tuned exhaust processor assembly |
| 04/16/1991 | US5007870 Jet propulsion craft provided with exhaust noise eliminating apparatus |
| 04/16/1991 | US5007499 Silencer for a centrifugal compressor |
| 04/11/1991 | DE3933484C1 Separator removing solids, liquids or condensates from gas stream - comprises housing with several windowed partitions through which a helical screw passes |
| 04/10/1991 | EP0421724A1 Muffler for internal combustion engine |
| 04/03/1991 | EP0420521A1 Improved emission control apparatus |
| 04/03/1991 | EP0419864A2 Muffler of industrial engine |
| 04/03/1991 | EP0419547A1 An exhaust pipe |
| 04/02/1991 | US5004069 Stamp formed muffler with transverse baffle tube |
| 04/02/1991 | US5004068 Muffler |
| 04/02/1991 | US5003781 Air supply and exhaust control systems for turbocharged internal combustion engines |
| 03/21/1991 | DE3921106A1 Operating normally aspirated IC engine - uses air suction manifold to generate accelerating air vol. upstream of fuel mixing zone |
| 03/13/1991 | CN1049894A Spiral muffler |
| 03/12/1991 | US4998741 Metal plate with reinforcing bead and a cylinder head gasket including the same |
| 03/06/1991 | CN2072596U Multi-functional silencer |
| 03/05/1991 | CA1280979C Tail pipe for drafting engine exhaust gas |
| 02/27/1991 | CN2072155U Spiral type impedance composite silencer |
| 02/27/1991 | CN2072154U Exhaust silencer |
| 02/19/1991 | US4993513 Muffler |
| 02/19/1991 | US4993512 Exhaust duct part in particular for an internal combustion engine |
| 02/07/1991 | DE3925186A1 Exhaust gas detoxification unit for Otto engines - converts carbon mon:oxide, hydrocarbon(s) and nitrogen oxide(s) into carbon di:oxide, water and nitrogen |
| 02/06/1991 | EP0411445A2 Regeneratable particulate filter trap system |
| 01/30/1991 | EP0410078A1 Sound absorption for the oil sump of a motor vehicle and method for its mounting |
| 01/23/1991 | EP0213163B1 Sound attenuation box |
| 01/23/1991 | CN2069925U Trap exhaust silencer |
| 01/16/1991 | CN2069483U Intake silencer-air cleaner of motorcycle |
| 01/11/1991 | WO1991000958A1 In-line noise attenuation device for a gas conduit |
| 01/11/1991 | CA2063708A1 In-line noise attenuation device for a gas conduit |
| 01/09/1991 | CN2069021U Silencer for automotive vehicle |
| 01/03/1991 | DE3916429A1 IC engine exhaust system - incorporates Helmholtz resonator to generate pressure wave to increase power |
| 01/02/1991 | EP0404801A1 Silencer for a gas flow. |
| 01/02/1991 | CN1048248A Vibration-absorptive type muffler |
| 01/02/1991 | CA1278524C Stamp formed muffler with multiple low frequency resonating chambers |
| 12/26/1990 | CN2068152U Air-driven silencer |
| 12/26/1990 | CN2068151U Soundproofing desmoking purifier |
| 12/25/1990 | US4979587 Jet engine noise suppressor |
| 12/19/1990 | CN2067759U 消音器 Silencer |
| 12/11/1990 | CA1277604C Fireplace flue ambient noise reducing device |
| 11/29/1990 | WO1990014146A1 Muffler for a compressed air driven motor |
| 11/28/1990 | CN2066495U High efficient silencer |
| 11/28/1990 | CN2066494U Local silencer for mining |
| 11/28/1990 | CN2066493U Exhausting silencer |
| 11/27/1990 | US4972921 Muffler for internal combustion engines |
| 11/20/1990 | US4971612 Reclassifying silencer |
| 11/20/1990 | US4971166 Muffler |
| 11/14/1990 | EP0396753A1 Silencer for combustion exhaust gas |
| 11/13/1990 | US4969537 Muffler assembly and method of manufacture |
| 11/05/1990 | CA2002762A1 Muffler for a compressed air driven motor |
| 11/01/1990 | WO1990013108A1 Active sound and/or vibration control |
| 11/01/1990 | WO1990012950A1 Diesel-soot filter with additional device for reducing oxides of nitrogen and/or oxidizing carbon monoxide |
| 10/31/1990 | EP0395540A1 Modular silencer |
| 10/31/1990 | EP0394451A1 Muffler |
| 10/31/1990 | EP0394284A1 Particulate filter module |
| 10/31/1990 | CN2064824U Drainage pipe connector for motorcycle silencer |
| 10/30/1990 | US4966253 Muffler device for exhaust systems |
| 10/24/1990 | EP0393257A1 Diesel soot filter with an additional arrangement for the reduction of nitrogen oxides and/or the oxidation of carbon monoxide |
| 10/24/1990 | CN2064416U Muffler for 15-horsepower diesel engine |
| 10/18/1990 | DE3911809A1 Exhaust manifold for naturally aspirated engine - incorporates convergent outlet pipe which forms thrust nozzle |
| 10/17/1990 | EP0392575A2 Exhaust gas cleaner with catalytic activity, and silencer for internal combustion engines |
| 10/16/1990 | US4963110 Exhaust system for marine propulsion |
| 10/10/1990 | EP0391014A2 Absorption silencer for internal combustion engines, especially for all-terrain vehicles |
| 10/09/1990 | USRE33370 Stamp formed muffler |
| 10/09/1990 | US4961314 Tuned exhaust processor assembly |
| 10/02/1990 | CA1274778A1 Tube and chamber construction for an exhaust muffler |
| 10/02/1990 | CA1274777A1 Exhaust muffler with angularly aligned inlets and outlets |