| Patents for F01N 1 - Silencing apparatus characterised by method of silencing (8,998) |
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| 10/03/1994 | CA2120409A1 Active noise control method and device |
| 09/27/1994 | US5350888 Broad band low frequency passive muffler |
| 09/21/1994 | EP0482042B1 In-line noise attenuation device for a gas conduit |
| 09/20/1994 | CA2013185C Stamp formed muffler with transverse baffle tube |
| 09/14/1994 | EP0615224A2 A method of determining the sound transfer characteristic of an active noise control system |
| 09/07/1994 | CN2176436Y Assembled muffler of jackdrill |
| 09/07/1994 | CN2176435Y Turbine blade exhaust pipe for eliminating waste gas and smoke |
| 08/31/1994 | EP0612993A2 Device for exchanging measurement or sampling probes |
| 08/30/1994 | US5343533 Transducer flux optimization |
| 08/24/1994 | EP0505403B1 In-line noise attenuation device |
| 08/24/1994 | CN2175308Y Combination type silencer |
| 08/23/1994 | US5340952 Exhaust muffler combining components made of different materials |
| 08/23/1994 | US5340275 Rotary throat cutoff device and method for reducing centrifugal fan noise |
| 08/18/1994 | WO1994018438A1 A silencer |
| 08/18/1994 | WO1994017761A1 Active noise-cancellation system for automotive mufflers |
| 08/17/1994 | EP0611089A2 Active acoustic control system matching model reference |
| 08/17/1994 | CN2174567Y Shunting straight-pipe type dissipative muffler for fan |
| 08/16/1994 | US5338903 Combination muffler and catalytic converter |
| 08/12/1994 | CA2115223A1 Active acoustic control system matching model reference |
| 08/11/1994 | DE4303548A1 Insulation driver |
| 08/09/1994 | US5336856 Electronic muffler assembly with exhaust bypass |
| 08/04/1994 | DE4302519A1 Verfahren zum Betreiben einer Abgasanlage für einen Verbrennungsmotor und dafür vorgesehene Abgasanlagen A method of operating an exhaust system for a combustion engine and exhaust systems provided for this purpose |
| 08/03/1994 | EP0521046B1 Active control of noise |
| 08/03/1994 | CN1090371A Method for making discharging unit of internal combustion engine adjustable and corresponding discharging unit |
| 07/28/1994 | DE4301749A1 Motor exhaust acoustic damper |
| 07/26/1994 | US5332873 Motor vehicle muffler |
| 07/14/1994 | DE4400536A1 Engine exhaust gas system for vehicle |
| 07/13/1994 | EP0605542A1 Noise damper with fluid flowing through it |
| 07/13/1994 | CN2171677Y Miniature exhaust silencer |
| 07/07/1994 | DE4244613A1 Automotive diesel catalytic converter insert joined to outer housing by exhaust pipe silencer insert |
| 07/06/1994 | EP0604992A1 Exhaust device for internal combustion engines |
| 07/05/1994 | US5326943 Exhaust muffler |
| 07/05/1994 | US5326942 Noise suppression muffler for moisture laden exhaust gases & method |
| 07/05/1994 | US5326295 Exhaust system for marine propulsion unit |
| 06/29/1994 | CN2170379Y Heat exchange silencer |
| 06/28/1994 | US5325438 In an internal combustion engine exhaust gas system |
| 06/28/1994 | US5325437 Apparatus for reducing noise in space applicable to vehicle compartment |
| 06/23/1994 | DE4341951A1 Interference noise damper for exhaust gas system |
| 06/22/1994 | EP0602091A1 Muffler |
| 06/21/1994 | US5323466 Tandem transducer magnet structure |
| 06/21/1994 | CA1330281C Jet propulsion craft provided with exhaust noise eliminating apparatus |
| 06/14/1994 | US5321759 Active noise control system for attenuating engine generated noise |
| 06/14/1994 | US5321214 Arrangement for disposing silencer of automobile |
| 06/14/1994 | CA2069040C Stamp formed muffler with in-line expansion chamber and arcurately formed effective flow tubes |
| 06/08/1994 | CN2168073Y Exhaust pipe sound-absorbing and heat-insulating apparatus for automobiles and motorcycles |
| 06/07/1994 | US5319165 Dual bandpass secondary source |
| 05/25/1994 | EP0542749A4 Single cavity automobile muffler |
| 05/24/1994 | US5315075 Exhaust gas muffler for an internal combustion engine |
| 05/17/1994 | US5313407 Integrated active vibration cancellation and machine diagnostic system |
| 05/05/1994 | DE4236466A1 Resonance noise damping system for two=stroke engine - uses high temperature alloy steel to give lightweight construction |
| 05/04/1994 | EP0595456A1 Car Silencer for absorbing sound and exhaust pollutants |
| 05/04/1994 | CN1024426C Rotary airflow type silencer |
| 05/03/1994 | CA1329140C Active sound attenuation system for engine exhaust systems and the like |
| 04/28/1994 | DE4235625A1 Exhaust silencer for motor vehicle - has extra connection to remove condensate from excess pressure chamber to exhaust discharge tube |
| 04/27/1994 | CN1024366C Silencer for centrifugal compressor |
| 04/20/1994 | EP0592693A1 Noise control device |
| 04/20/1994 | CN1085629A Spiral-flow narrow-slit muffler |
| 04/19/1994 | US5304749 Muffler for internal combustion engine |
| 04/13/1994 | CN2161733Y Spiral-flow soundproofing oil-saving purifier |
| 04/12/1994 | US5302783 Resonator |
| 04/06/1994 | CN2160758Y Exhausting and silencing apparatus for motorcycle |
| 03/30/1994 | EP0589516A2 Silencer arrangement for combustion engines |
| 03/24/1994 | DE4303508C1 Metal conductor for exhaust systems - consists of U=shaped belt or rings with metal or ceramic lining or covering protruding over edges |
| 03/22/1994 | CA1328004C Aircraft cabin noise control apparatus |
| 03/17/1994 | WO1993024744A3 Muffler with catalytic converter arrangement |
| 03/15/1994 | US5294411 Ceramic carrier having walls with channels for gas flow and a catalytically active surface layer as an electrical auxillary heater |
| 03/15/1994 | US5293744 Exhaust manifold muffler for an internal combustion engine |
| 03/02/1994 | CN1083171A Silencing equipment of small motor bicycle |
| 03/01/1994 | CA2023946C Muffler of industrial engine |
| 02/16/1994 | CN2156289Y Coherent wave type blower sound damping hood |
| 02/15/1994 | US5285640 Integrated post-engine emissions heater, catalytic converter and muffler |
| 02/03/1994 | WO1994002718A1 Exhaust silencer for internal combustion engine |
| 02/01/1994 | US5283398 For an internal combustion engine |
| 01/26/1994 | EP0579956A1 Catalytic converter for internal combustion engines |
| 01/20/1994 | WO1994001659A1 Inlet or exhaust line for reciprocating machine |
| 01/19/1994 | CN1080975A Frictional damping type exhaust silencer |
| 01/18/1994 | US5280143 Muffler with a scavenging effect |
| 01/12/1994 | CN1080689A Silencing apparatus used in vehicles and method for manufacture of same |
| 01/11/1994 | US5278780 System using plurality of adaptive digital filters |
| 01/06/1994 | WO1994000678A1 Muffler assembly with balanced chamber and method |
| 01/04/1994 | US5276291 Acoustic muffler for high volume fluid flow utilizing Heimholtz resonators with low flow resistance path |
| 12/29/1993 | CN2151261Y Muffling tower |
| 12/29/1993 | CN2151260Y Effective muffler |
| 12/29/1993 | CN2151259Y Noise reducing aid for automobile exhaust muffler |
| 12/29/1993 | CN2151258Y Energy-saving muffler |
| 12/28/1993 | US5274201 Noise muffler for an air blower |
| 12/23/1993 | WO1993025999A1 A transducer arrangement for active sound cancellation systems |
| 12/23/1993 | WO1993025998A1 An active noise cancellation muffler for a motor vehicle |
| 12/21/1993 | US5272286 Single cavity automobile muffler |
| 12/21/1993 | US5271224 Variable exhaust system for an internal combustion engine |
| 12/09/1993 | WO1993024744A2 Muffler with catalytic converter arrangement |
| 12/09/1993 | CA2137163A1 Muffler with catalytic converter arrangement |
| 12/01/1993 | EP0571380A1 Silencer for gas induction and exhaust systems |
| 12/01/1993 | EP0373188B1 Exhaust gas muffler arrangement for combustion engine |
| 12/01/1993 | CN2148180Y Exhaust silencer |
| 11/30/1993 | US5266755 Car silencer for absorbing sound and exhaust pollutants |
| 11/30/1993 | US5266753 Muffler for a fan, particularly for an internal combustion engine |
| 11/30/1993 | US5265420 Exhaust system of a multi-cylinder reciprocating engine |
| 11/24/1993 | CN2147356Y Outlet sound damper for screw compressor |
| 11/18/1993 | EP0404801B1 Silencer for a gas flow |