| Patents for F01N 1 - Silencing apparatus characterised by method of silencing (8,998) |
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| 04/16/1992 | DE4032185A1 Absorption silencer for IC engine - has series of intermediate ducts heated by exhaust gas |
| 04/14/1992 | US5103931 Exhaust silencing means for marine propulsion |
| 04/08/1992 | EP0479367A2 Method and apparatus for attenuating engine generated noise |
| 04/08/1992 | EP0479342A2 High performance exhaust system for internal combustion engine |
| 04/08/1992 | EP0432233A4 Muffler for a compressed air driven motor |
| 04/07/1992 | US5101931 Discharge muffler and method |
| 04/07/1992 | CA1298559C Muffler apparatus for internal combustion engine |
| 04/01/1992 | CN2100488U Combined efficient silencer |
| 03/28/1992 | WO1992006284A1 Trap apparatus with bypass |
| 03/28/1992 | CA2090866A1 Trap apparatus with bypass |
| 03/24/1992 | US5097924 Muffler for a compressed air driven motor |
| 03/24/1992 | US5097923 Active sound attenation system for engine exhaust systems and the like |
| 03/24/1992 | US5097664 Method for controlling exhaust system of vehicle |
| 03/19/1992 | WO1992004533A1 Muffler assembly with perforated partition for ignition of accumulated fuel and method |
| 03/19/1992 | DE4029383A1 Foam body mfr. - uses prepd. foam sections to be assembled with carrier layer to form permeable and passage zones |
| 03/19/1992 | DE4029382A1 Ceramic foam body mfr. - includes forming dense inner wall cladding to determine flow path of medium flowing through body |
| 03/18/1992 | EP0475398A1 Muffler assembly for engine |
| 03/17/1992 | US5096446 Exhaust silencer unit for propulsion unit |
| 03/17/1992 | CA1297414C Silencer |
| 03/11/1992 | EP0473839A1 Stamp formed muffler with low back pressure |
| 03/05/1992 | DE4105230A1 Absorption sound damper for vehicle exhaust system - makes use of movable sleeve with perforation holes |
| 03/03/1992 | CA1296648C Stamp formed exhaust muffler with conformal outer shell |
| 02/18/1992 | US5088575 Acoustic system with transducer and venturi |
| 02/12/1992 | EP0470656A1 Method and apparatus for attenuating engine noise |
| 02/12/1992 | EP0470390A1 Exhaust pipe arrangement of a multicylinder internal combustion engine |
| 02/12/1992 | EP0470153A1 Active sound and/or vibration control. |
| 02/05/1992 | EP0468955A1 Diesel-soot filter with additional device for reducing oxides of nitrogen and/or oxidizing carbon monoxide |
| 01/29/1992 | CN2094620U Wide frequency sheet type sound damper |
| 01/25/1992 | CA2020979A1 Resonator |
| 01/22/1992 | EP0357595B1 Exhaust gas cleaning device for diesel engines |
| 01/22/1992 | CN2093903U Expanding and resonant compound silencer for vehicles |
| 01/21/1992 | CA2047110A1 Exhaust muffler for engines |
| 01/15/1992 | CN2093242U Sanitary shape complex impedance type silencer |
| 01/14/1992 | US5080048 Power blower |
| 01/08/1992 | CN2092606U Sound-absorbing devices of airflow revolving type |
| 01/07/1992 | US5078631 Marine exhaust system |
| 01/01/1992 | CN2091953U High-speed jet muffler |
| 12/31/1991 | US5076393 Engine exhaust muffler |
| 12/25/1991 | CN2091356U Mine fan resonance vibration dissipative muffler |
| 12/25/1991 | CN1015192B Method and apparatus for airflow noise-elimination |
| 12/17/1991 | CA1293198C Turbine engine noise suppression apparatus and methods |
| 12/04/1991 | EP0458891A1 Screw rotor machine comprising a sound silencing device. |
| 11/26/1991 | US5067584 Low cost replaceable type sound dampening unit for vacuum cleaning machine |
| 11/21/1991 | EP0457287A2 An anti-pollution device for treating the exhaust gases from internal combustion engines and burners in general, functioning also as exhaust silencer |
| 11/14/1991 | DE4014536A1 Sound damper for pneumatic axial piston motor - has several linearly connected expansion chambers separated by adjustable throttle devices |
| 11/12/1991 | US5063736 Particulate filter trap load regeneration system |
| 11/12/1991 | CA1291952C Muffler |
| 11/06/1991 | EP0455623A1 Exhaust silencer, especially for a two-stroke engine with catalytic converter |
| 11/06/1991 | EP0455375A1 A dynamically tuned exhaust system |
| 11/05/1991 | US5063598 Active noise control system with two stage conditioning |
| 11/05/1991 | US5062263 Exhaust gas depurator having a catalytic activity, and silencer, for internal combustion engines |
| 11/05/1991 | CA2039110A1 Active muffler with dynamic tuning |
| 10/30/1991 | EP0454342A2 An active noise cancellation apparatus |
| 10/30/1991 | EP0454341A2 An active noise cancellation apparatus |
| 10/30/1991 | CN1055796A 滤波式排气消声器 Filter Exhaust muffler |
| 10/26/1991 | CA2038440A1 Active muffler transducer arrangement |
| 10/26/1991 | CA2038439A1 Active noise control system with two stage conditioning |
| 10/22/1991 | US5060271 Active muffler with dynamic tuning |
| 10/22/1991 | US5058704 Turbo jet muffler |
| 10/22/1991 | US5058702 Silencer device for exhausts of motors and similar, with acoustic interference |
| 10/22/1991 | CA1291045C Muffler system |
| 10/17/1991 | WO1991015666A1 Single cavity automobile muffler |
| 10/15/1991 | US5056832 Spacing ring for tubes in high temperature environment |
| 10/15/1991 | CA1290777C Engine with sealing head seat ring |
| 10/03/1991 | WO1991014854A1 Active control of noise |
| 10/02/1991 | CN2085854U Ladder-shaped narrow slit type high-efficiency silencer for internal combustion engine |
| 09/18/1991 | EP0446813A1 Muffler assembly of internal combustion engine |
| 09/18/1991 | EP0446726A1 Silencer device |
| 09/17/1991 | US5048290 Arrangement for waste gas purification |
| 09/17/1991 | US5048287 Tuned exhaust processor assembly |
| 09/11/1991 | EP0446064A2 Glass fiber material containing component of exhaust system. |
| 09/11/1991 | EP0296165B1 Exhaust system for combustion engines |
| 09/10/1991 | US5046977 Exhaust muffler for marine engines |
| 09/10/1991 | US5046308 Exhaust system for internal combustion engines provided with a device for housing filters designed to trap solid particles and unburned hydrocarbons entrained in exhaust gases |
| 09/05/1991 | WO1991013243A1 Active control of machine performance |
| 09/04/1991 | CN1054299A Silencer for centrifugal compressor |
| 09/03/1991 | US5044464 Active acoustic attenuation mixing chamber |
| 08/27/1991 | US5043147 Combined muffler and catalytic converter exhaust unit |
| 08/22/1991 | WO1991012171A1 Marine exhaust system |
| 08/13/1991 | CA2009892A1 Muffler for exhaust combustion gas noise |
| 08/08/1991 | WO1991011593A1 Muffler for emission control of diesel particulates |
| 08/06/1991 | US5036585 Perforated internal component |
| 08/01/1991 | DE3929533A1 Piston engine operating method - has silencer chamber containing overlapping pipes forming heat accumulator to maintain exhaust temperature |
| 07/31/1991 | EP0438804A1 Apparatus for driving turbo supercharger |
| 07/31/1991 | CN2081888U Muffler for automobile motor |
| 07/31/1991 | CN2081887U Core pipe of silencing duster |
| 07/25/1991 | DE3940194A1 Piston IC engine operating system - uses internal ribs in nozzle and pipe downstream |
| 07/23/1991 | US5033581 Muffler for an internal combustion engine |
| 07/23/1991 | US5033580 Absorption silencer for internal-combustion engines, especially for off-road vehicles |
| 07/10/1991 | CN2080564U Silencing and shock-absorbing device for steam heating |
| 07/09/1991 | CA1285886C Silencer for a cooling fan of a vacuum cleaning system |
| 07/04/1991 | DE4040721A1 Silencer unit for four-stroke motorcycle - includes coated catalyst(s) for exhaust gas cleaning |
| 07/03/1991 | EP0434895A1 Silencer and method of producing of same |
| 06/27/1991 | WO1991009214A1 Attenuation of dynamic pressure fluctuations in ducts |
| 06/26/1991 | EP0434578A1 Exhaust outlet with venturi |
| 06/26/1991 | EP0434577A1 Exhaust outlet with gas cleaner |
| 06/26/1991 | CN2079660U Sound insulation cover |
| 06/26/1991 | CN2079659U Jet fuel-saving purifier for tail gas of car |
| 06/25/1991 | US5025986 Heating system for a motor vehicle with an air-cooled rear engine |
| 06/25/1991 | US5025890 Engine exhaust apparatus |